A hearty, nutritious, and affordable Mediterranean-style frittata packed with protein and vitamins thanks to the spinach. Enjoy it for breakfast, brunch, or a light dinner.
In a large oven-safe skillet, heat the olive oil over medium heat. Add the diced onion and sauté for about 3-4 minutes until soft and translucent. Then add the minced garlic and cook for another minute.
Stir in the chopped spinach and cook for 2-3 minutes until wilted. Season with salt, pepper, and oregano if using.
In a mixing bowl, whisk together the eggs, milk, and crumbled feta until well combined. Pour this mixture over the sautéed vegetables in the skillet.
Let the frittata cook on the stovetop for about 5 minutes until the edges set, then transfer the skillet to the preheated oven.
Bake for 15-20 minutes or until the frittata is set in the center and golden brown on top.
Remove from the oven and let it cool for a few minutes before slicing into wedges. Serve warm, garnished with optional toppings.