Asparagus Pepper & Feta Frittata

Pre-heat oven to 375°F (190°C).

In a large bowl, whisk eggs, milk, salt and pepper. Whisk in red peppers and feta. Set aside.

In a 10-inch (25-cm), oven proof, non-stick skillet, heat oil over medium-high heat. Add onion, salt, pepper, and asparagus. Cook until softened, about 5 minutes.

Pour egg mixture into skillet with fillings.

Bake until set and golden, about 25 minutes.