Description
This Mushroom Frittata is a delicious and hearty Italian-inspired breakfast or brunch dish made with eggs, sautéed mushrooms, onions, garlic, and melted Gruyère cheese. It’s baked to perfection in the oven, resulting in a fluffy and flavorful egg casserole that’s perfect for any time of the day. Simple to prepare and versatile, this frittata can be customized with your favorite vegetables or proteins and enjoyed warm or at room temperature.
Ingredients
Scale
Egg Mixture
- 8 large eggs
- 1/4 cup whole milk
- 1/2 teaspoon salt
- 1/4 teaspoon black pepper
Vegetables and Aromatics
- 2 tablespoons olive oil
- 1 small yellow onion, diced
- 2 cups sliced mushrooms (cremini or button)
- 1 clove garlic, minced
Cheese and Garnish
- 1/2 cup shredded Gruyère or Swiss cheese
- 2 tablespoons chopped fresh parsley (optional)
Instructions
- Prepare the Oven and Egg Mixture: Preheat your oven to 375°F (190°C). In a medium-sized bowl, whisk together the eggs, whole milk, salt, and black pepper until fully combined. Set this mixture aside while you prepare the vegetables.
- Sauté Onions and Mushrooms: Heat 2 tablespoons of olive oil in a 10-inch oven-safe skillet over medium heat. Add the diced onion and sauté for 3 to 4 minutes until softened and translucent. Next, add the sliced mushrooms and continue cooking for 5 to 7 minutes until they release their moisture and start to brown. Stir in the minced garlic and cook for an additional minute until fragrant.
- Combine Egg Mixture with Vegetables: Reduce the heat to low. Pour the whisked egg mixture into the skillet over the sautéed mushrooms and onions. Gently stir to evenly distribute the vegetables throughout the eggs. Sprinkle the shredded Gruyère or Swiss cheese uniformly across the top. Allow the frittata to cook undisturbed on the stovetop for 2 to 3 minutes just until the edges begin to set.
- Bake the Frittata: Carefully place the oven-safe skillet into the preheated oven. Bake for 10 to 12 minutes, or until the center of the eggs is fully set and firm to the touch.
- Rest and Serve: Remove the skillet from the oven and allow the frittata to rest for a few minutes to firm up further. Optionally, garnish with chopped fresh parsley. Slice into portions and serve warm or at room temperature for a satisfying meal.
Notes
- You can add spinach, bell peppers, or cooked bacon to the frittata for additional flavor and texture variations.
- This dish is perfect for meal prepping and can be enjoyed cold or gently reheated.
- Use an oven-safe skillet such as cast iron or stainless steel to easily transfer from stovetop to oven.
- If Gruyère or Swiss cheese is unavailable, mozzarella or cheddar can be used as alternatives.
