Stuffed Baby Portobello Mushrooms

Recipe for Stuffed Baby Portobello Mushrooms

Hello! We are going to prepare a baked vegetable recipe that is ideal for a quick dinner or to offer as a different appetizer at home. This preparation stands out for being a comforting and healthy vegetarian dish, which allows us to easily integrate fresh ingredients. By baking the mushrooms, we achieve a firm texture that perfectly complements the intense filling, ensuring a very tasty bite every time.

Preparation time

Here is the detail of the time you will invest in the kitchen to organize your steps well before starting to work.

• Preparation: 15 minutes
• Cooking: 25 minutes
• Total: 40 minutes
• Servings: 6
• Difficulty: Easy

Ingredients

For the mushrooms

• 6 medium baby portobello mushrooms
• 1 tablespoon extra virgin olive oil
• Salt to taste
• Black pepper to taste

For the filling

• 110 grams of sun-dried tomatoes
• 1 small white onion
• 2 cloves of garlic
• 1 fresh celery stalk
• 25 grams of vegan Parmesan cheese
• 1 tablespoon of dried tarragon
• 1 bunch of fresh basil
• 1 bunch fresh parsley
• 1 tablespoon extra virgin olive oil

In case you don't have sun-dried tomatoes, you can replace them with roasted red peppers or fresh cherry tomatoes. If you decide to use cherry tomatoes, it will be necessary to cook them for an additional five minutes in the pan to evaporate all the excess natural water they contain. If you can't find vegan Parmesan cheese in your area, an excellent homemade option is to crush toasted peeled almonds together with nutritional yeast and a pinch of salt, which will provide the same dry texture and salty flavor profile we are looking for to gratin.

Utensils we will use

• Flat baking sheet
• Papel de horno o papel pergamino
• Large frying pan
• Chef's knife
• Kitchen cutting board
• Bol mediano de cristal o cerámica
• Tablespoon
• Espátula de madera

Preparation

1. Limpieza de las piezas: Take each of the baby portobello mushrooms and clean their outer surface using a completely dry cotton cloth or a slightly damp paper towel. Remove the stem from each unit by applying a gentle circular motion with your fingers until it detaches from the base. It is essential not to place the pieces under running water. Mushrooms have a very porous cellular structure that acts like a sponge; if they absorb external moisture, they will release it onto the tray during cooking, and the result will be a flabby and watery base. Keep the stems aside on the board to use them later.
2. First baking: Turn on the oven's heat source and set it to 175 degrees Celsius. Spread parchment paper over the flat baking sheet. Place the clean caps on the paper, making sure the internal cavity faces upwards. Sprinkle an even layer of salt, black pepper, and distribute the tablespoon of olive oil over all of them. Place the tray in the oven for 15 minutes. You will know that this preliminary step is ready when you gently press the edges with a spoon and notice that the structure begins to yield and soften. Performing this pre-cooking is what prevents the base from being raw at the end of the recipe.
3. Cutting the vegetables: While the oven does its work, take the knife and chop the onion, garlic cloves, fresh celery stalk, and the reserved mushroom stems. Try to make all cuts the size of a small cube, close to half a centimeter thick. Then, take the sun-dried tomatoes and cut them into thin pieces of similar size. Maintaining uniformity in the cuts ensures that the heat from the pan penetrates all ingredients equally at the same time.
4. Cooking the aromatic base: Place the pan on the stove over medium heat and pour in the remaining tablespoon of extra virgin olive oil. When you notice the oil is hot but not smoking, add the onion cubes, garlic, celery, and mushroom stems. Stir constantly with a wooden spatula for about 10 minutes. You'll know they're ready when the onion turns transparent and the celery is tender when pressed against the edge of the pan. If at any point you notice the ingredients sticking to the metal bottom, immediately lower the heat to prevent the garlic from becoming bitter.
5. Incorporating the sun-dried tomatoes: Add the previously chopped sun-dried tomatoes to the hot pan. Mix all components for an additional three minutes so that the natural oils from the tomato permeate the rest of the vegetables. Once this time has passed, remove the pan completely from the heat. Let the mixture rest for about five minutes at room temperature. This temperature drop is necessary to prevent wilting and burning the fresh herbs that we will add in the next step.
6. Assembling the stuffing: Empty all the warm contents from the pan into the medium bowl. Add the dried tarragon, chopped fresh parsley, half of the chopped fresh basil, and the vegan Parmesan cheese. Use the spoon to integrate all elements from the bottom to the surface. Taste a small portion of this mixture. Sun-dried tomatoes concentrate a lot of sodium inside them, so you should only add more salt if you truly feel it's needed. Doing this step off the heat protects the bright green color and essential oils of the fresh herbs.
7. Filling and final baking: Remove the tray with the pre-cooked caps from the oven. With the help of a tablespoon, take generous portions of the mixture from the bowl and place them inside each cavity. Apply slight downward pressure to compact the ingredients, ensuring the inside is firm and won't fall apart when bitten. Reinsert the entire tray into the oven at the same temperature. Continue baking for approximately 10 minutes. The visual cue that will indicate the dish is completely finished will be a slight golden color on the surface of the vegan cheese and a completely tender texture when piercing the base of the mushroom with the tip of a knife.

To finish and serve

Remove the hot tray with protective gloves and let the preparation rest at room temperature for two minutes to allow the internal juices to stabilize. Sprinkle the rest of the chopped fresh basil over each piece to provide a final visual contrast and enhance the aroma before serving. Serve the pieces hot, making sure not to break them when transferring them to the plate. If you wish to serve the accompaniment in a cylindrical shape using a professional plating ring, remember that at home you can use a small cup or a wide glass, pressing the food inside before unmolding it onto the plate. This recipe pairs spectacularly with a vegan mushroom and lentil roast with miso gravy if you're looking to put together a complete feast, or simply presented on a flat platter as a main option.

Nutritional Information

• Calories: 134 kcal
• Proteins: 6 g
• Fats: 7 g
• Carbohydrates: 16 g
• Fiber: 4 g

The values presented are approximate estimates per serving and may vary slightly depending on the exact size of the vegetables and the brands of ingredients you use in your kitchen.

4 common mistakes and how to avoid them

Submerging vegetables under tap water: As we mentioned during the step-by-step process, the cellular structure of mushrooms acts in the same way as an absorbent sponge. If you place them directly under running water or soak them in a bowl, they will become saturated with liquid. When exposed to the oven's heat, all that retained water will begin to boil from within, resulting in a flabby and rubbery texture, and completely diluting the dish's flavor. The correct technique is to use a slightly damp paper towel to patiently clean the surface, rubbing only where there are visible traces of dirt.

Ignore uniformity when chopping: When preparing any type of filling mixture, the size of the cuts dictates the cooking pace. If you leave very large pieces of onion and very small pieces of garlic, the garlic will burn quickly in the pan long before the onion reaches its ideal cooking point. Take a few extra minutes at the cutting board to ensure that each vegetable cube has similar dimensions. This not only balances cooking times over the heat but also offers a much more pleasant and homogeneous chewing experience.

Seasoning blindly without tasting first: Dehydrated ingredients, such as sun-dried tomatoes, concentrate high levels of sodium and sugars during their curing process. If you add the amount of salt you would normally use for a raw vegetable mixture without first tasting the partial result, you run a great risk of ruining the recipe's balance, making it inedible due to excess salt. The golden rule is to integrate all components into the bowl, taste a little with a clean spoon, and only then adjust the seasonings. Remember that we can always add more salt, but it is practically impossible to remove it once integrated.

Skipping the initial baking phase: Putting the raw mixture inside the raw vegetable and baking everything at the same time might seem like a clever shortcut to save time. However, the cooking times for the fleshy base and the top mixture are completely different. If you omit the first baking, you will end up with a dry or burnt surface, and a thick base that is completely raw and hard inside. Pre-baking allows the portobello to expel some of its moisture and soften its cellular fibers, ensuring that both parts finish cooking at exactly the same time during the second oven entry.

When is it ideal to enjoy it?

These mushrooms are extremely versatile and adapt to multiple contexts without losing their charm. They are exceptional for a family dinner during the week, as they require very little active time in the kitchen and allow you to quickly prepare the menu while the oven does most of the work. At the same time, they work wonderfully as an appetizer if you have guests at home during the weekend; their individual portion presentation makes it easy for each diner to serve themselves without creating complications at the table. Being free of heavy ingredients, it is ideal for those occasions when you are looking for a comforting meal that doesn't leave you feeling heavy, making a great pairing if served alongside a fresh ensalada de quinoa con verduras asadas y vinagreta de cítricos.

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Frequently asked questions (FAQ)

Share your experience

Cooking is for experimenting and sharing. Leave your comment and share your own little tricks! I would love to read how you adapted the quantities to your personal taste or if you decided to include a different aromatic herb than the ones we suggested. Creating a community around the home stove is the best way to learn from each other daily.

Culinary glossary

Below, I detail simply and directly some of the technical terms we mentioned during the process, so you have no doubts about how to apply them in this or any other future preparation.

• Cap: Refers to the upper, fleshy, and rounded part of the mushroom. In today's recipe, it serves as the physical container that holds and supports our entire aromatic mixture.
• Stem: It is the lighter-colored cylindrical piece that connects the main cap to the root in the ground. Here we simply remove it to make space, but we use it by chopping it to avoid waste.
• Farce: It is the technical term in cooking to refer to any filling. It consists of a combination of finely chopped, cooked, and seasoned ingredients that are introduced into a cavity.
• Pre-cooking or first baking: This refers to the method of partially subjecting an ingredient to heat before combining it with the others. Here we use it to ensure that the thick vegetable base does not remain hard when served.
• Translucent (onion stage): Indicates the exact moment in the pan where raw onion cubes lose their original opaque white color and become slightly transparent and very tender to the touch.
• Season: It is the fundamental act of adding elements such as salt, pepper, or aromatic herbs to a food base to enhance, balance, and define its final flavor profile before serving them.