Ingredients
Method
Preparing the Portobello Mushrooms
- Preheat the oven to 400°F (200°C). While the oven heats, line a baking sheet with parchment paper or aluminum foil for easier cleanup.
- Clean the mushrooms by wiping them with a damp cloth to remove dirt. Then, remove the stems and gently scrape out the gills using a spoon. This step is crucial as the gills can give the mushrooms a slightly bitter flavor, and removing them provides more space for the delicious stuffing.
- Season the mushrooms by brushing them with olive oil on both sides. Sprinkle with minced garlic, oregano, salt, and black pepper. The olive oil helps the mushrooms roast perfectly, ensuring a tender yet slightly crisp texture. Set aside.
Preparing the Ricotta Spinach Filling
- Combine the ricotta in a medium bowl with the grated Parmesan, chopped spinach, beaten egg, nutmeg, and a pinch of salt and pepper. The egg acts as a binder, giving the filling a creamy yet firm texture as it bakes. Nutmeg complements the spinach and cheese mixture, adding a subtle warmth that enhances the overall flavor.
- Mix well until everything is evenly incorporated. The spinach will soften as it bakes, creating a beautifully layered texture.
Assembling the Lasagna Mushrooms
- Spoon a tablespoon of marinara sauce into the base of each prepared mushroom. The marinara acts as the first flavorful layer, giving the mushrooms a rich, tangy base and keeping them moist while they bake.
- Add the ricotta-spinach mixture into each mushroom, dividing it equally. Spread the mixture smoothly to cover the sauce. The creamy filling contrasts wonderfully with the earthiness of the mushrooms.
- Top each mushroom with another tablespoon or two of marinara sauce, then sprinkle a generous amount of shredded mozzarella over the top. This creates the classic cheesy topping that browns beautifully in the oven.
Baking
- Bake the mushrooms in the preheated oven for about 25–30 minutes, or until the cheese is bubbly and golden. The mushrooms will become tender, and the filling will set beautifully, holding all the layers together.
- To finish, broil for 2–3 minutes if you want a crispier cheese topping. Keep a close eye during this step, as the cheese can brown quickly.
Garnish and Serve
- Once baked, remove the mushrooms from the oven and let them cool for a few minutes. This allows the flavors to settle and makes the mushrooms easier to handle. Drizzle with balsamic vinegar if desired, adding a touch of acidity to balance the richness. Garnish with freshly chopped basil for a pop of color and freshness.
- Serve these stuffed mushrooms alongside a simple green salad or crusty garlic bread for a complete meal.
