Zucchini Frittata

Step 1
Preheat the oven to 350 degrees F (175 degrees C).

Step 2
Combine zucchini, bell pepper, garlic, and salt in a large, oven-safe skillet. Add 1 cup water and simmer until zucchini is tender, 5 to 7 minutes.

Step 3
Drain vegetables in a colander; discard garlic.

Step 4
Heat oil in the same skillet over medium heat. Stir in onion, mushrooms, and butter; add drained vegetables. Cook and stir until onion is transparent, about 5 minutes. Stir in eggs and season with salt and pepper. Reduce the heat to low and cook until eggs are set, about 5 minutes. Remove from the heat and sprinkle mozzarella cheese over top.

Step 5
Bake in the preheated oven for 10 minutes. Remove from the oven and turn on the broiler.

Step 6
Sprinkle Parmesan cheese over frittata. Place under the preheated broiler until cheese is bubbling and golden brown, about 5 minutes.

Step 7
Remove from the oven and let stand for 5 minutes before cutting into 5 wedges and serving.