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Stuffed Portabella Mushrooms - A Savory, Satisfying Favorite

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Prep Time 15 minutes
Cook Time 25 minutes
Total Time 40 minutes
Servings: 4 servings
Ingredients Method

Ingredients
  

  • 4 large portabella mushroom caps, stems and gills removed
  • 2 tablespoons olive oil, plus more for brushing
  • 1 small yellow onion, finely chopped
  • 3 cloves garlic, minced
  • 3 cups fresh spinach, chopped (or 1 cup thawed frozen spinach, squeezed dry)
  • 1/2 cup sun-dried tomatoes, chopped (oil-packed, drained)
  • 1/2 cup breadcrumbs (panko or regular)
  • 1/3 cup grated Parmesan
  • 3/4 cup shredded mozzarella (or provolone)
  • 2 tablespoons fresh parsley, chopped (or 1 teaspoon dried Italian seasoning)
  • 1 tablespoon balsamic vinegar
  • 1/2 teaspoon crushed red pepper flakes (optional)
  • Salt and black pepper
  • Lemon wedges, for serving (optional)
  • Optional add-ins: cooked crumbled Italian sausage, cooked quinoa, or toasted pine nuts

Method
 

  1. Prep the mushrooms: Heat the oven to 400°F (200°C). Line a sheet pan with parchment. Gently twist off stems and scrape out gills with a spoon. Brush both sides with olive oil and season with salt and pepper.
  2. Pre-bake the caps: Place mushrooms gill side down and bake for 10 minutes. Flip to gill side up and let any moisture drain off. This step helps avoid soggy bottoms.
  3. Cook the aromatics: In a skillet over medium heat, add 2 tablespoons olive oil. Sauté onion with a pinch of salt until soft, 4–5 minutes. Add garlic and cook 30 seconds until fragrant.
  4. Add the veggies: Stir in spinach and cook until wilted. Mix in sun-dried tomatoes and turn off the heat.
  5. Build the filling: Stir in breadcrumbs, Parmesan, half the mozzarella, parsley, balsamic, red pepper flakes, and a few grinds of black pepper. Taste and adjust salt. Fold in any optional add-ins now.
  6. Stuff the caps: Spoon the filling evenly into the mushrooms, mounding slightly. Top with the remaining mozzarella.
  7. Bake to finish: Return to the oven and bake 12–15 minutes, until cheese is melted and golden at the edges. For extra color, broil 1–2 minutes, watching closely.
  8. Serve: Let rest 3 minutes. Finish with a squeeze of lemon and a sprinkle of parsley. Serve warm.