Can I freely substitute ingredients?

Follow the listed quantities and preparation. Substitutions can change texture and timing; only the options explicitly described in this recipe are suggested, without a claim of kitchen testing.

Air Fryer Stuffed Portobello Mushrooms with Spinach and Feta

Name: Air Fryer Stuffed Portobello Mushrooms with Spinach and Feta
Prep time: 10 min
Cook time: 21 min
Total time: 38 min
Yield: 4 servings
Cuisine: Mediterranean
Ingredients: 4 large portobello mushroom caps, stems and gills removed; 2 cups fresh spinach leaves, roughly chopped; 1/2 cup crumbled feta cheese; 2 cloves garlic, minced; 1/4 cup finely chopped red onion; 2 tablespoons olive oil, divided; 1 teaspoon dried oregano; 1/2 teaspoon dried basil; Salt and freshly ground black pepper, to taste; 1/4 teaspoon red pepper flakes (optional for mild heat); 1 tablespoon fresh lemon juice; 2 tablespoons grated Parmesan cheese (optional for topping); Non-stick cooking spray

By AirFryFeast Editorial TeamPublished Mar 25, 2026 | Updated Oct 4, 2026

Portobello caps hold a spinach, onion, garlic and feta filling cooked first in a skillet. Finish the stuffed mushrooms in the air fryer until the caps are tender and the topping is golden. Choose vegetarian-labeled feta and topping cheese for a vegetarian dish.

Start cooking

Air fryerMediterraneanEasyAir Fryer Friendly

Prep Time10 mins

Cook Time21 mins

Total Time38 mins

Servings4

Temperature375°F / 190°C

Ingredients

Servings4

4 large portobello mushroom caps, stems and gills removed
2 cups fresh spinach leaves, roughly chopped
1/2 cup crumbled feta cheese
2 cloves garlic, minced
1/4 cup finely chopped red onion
2 tablespoons olive oil, divided
1 teaspoon dried oregano
1/2 teaspoon dried basil
Salt and freshly ground black pepper, to taste
1/4 teaspoon red pepper flakes (optional for mild heat)
1 tablespoon fresh lemon juice
2 tablespoons grated Parmesan cheese (optional for topping)
Non-stick cooking spray

Instructions

Preheat your air fryer to 375°F (190°C) for 5 minutes.
Brush all four portobello mushroom caps on both sides using 1 tablespoon olive oil in total and season lightly with salt and pepper. Set aside.
Heat the remaining 1 tablespoon olive oil in a medium skillet over medium heat. Add the minced garlic and chopped red onion; sauté for 2-3 minutes until fragrant and translucent.
Add the chopped spinach to the skillet and cook until wilted, about 2-3 minutes. Stir in dried oregano, dried basil, red pepper flakes (if using), salt, and pepper.
Remove the skillet from heat and stir in the crumbled feta cheese and fresh lemon juice. Mix until well combined.
Place the mushroom caps in the air fryer basket, cavity side up.
Evenly spoon the spinach and feta mixture into each mushroom cap, pressing lightly to pack the filling.
If desired, sprinkle grated Parmesan evenly over the tops of the stuffed mushrooms for a golden, crispy finish.
Air fry at 375°F (190°C) for 12-15 minutes, or until the mushrooms are tender and the topping is golden and slightly crisp.
Carefully remove the mushrooms from the air fryer and let them cool for 2 minutes before serving.
Serve warm as a satisfying main course alongside a fresh Mediterranean salad or your favorite side dish.

Recipe guidance

Use 1 tablespoon oil across all four caps, not per mushroom. Use the remaining tablespoon in the skillet. Keep caps in one layer; repeat the air-frying stage if they do not fit. The timing is an estimate for one batch, including preheating, skillet cooking and the 2-minute rest.

Storage

Store leftover Air Fryer Stuffed Portobello Mushrooms with Spinach and Feta in an airtight container in the refrigerator for up to 3 days. Cool the food before sealing so excess steam does not soften the texture.

FAQ

What should I know before starting?: Use 1 tablespoon oil across all four caps, not per mushroom. Use the remaining tablespoon in the skillet. Keep caps in one layer; repeat the air-frying stage if they do not fit. The timing is an estimate for one batch, including preheating, skillet cooking and the 2-minute rest.
Can I freely substitute ingredients?: Follow the listed quantities and preparation. Substitutions can change texture and timing; only the options explicitly described in this recipe are suggested, without a claim of kitchen testing.