Directions:
- Preheat your oven to 400°F (200°C), so it's ready to go once your frittata mixture is prepared.
- Sauté the veggies: Heat the olive oil in your cast iron skillet over medium heat. Add the diced onions and bell peppers, sautéing until they're soft and slightly caramelized, about 5 minutes. If you're using spinach, add it last and cook until just wilted, usually about 1-2 minutes.
- Add your meat: If you're including bacon or sausage, now's the time to stir it in, ensuring it's evenly distributed with the veggies.
- Whisk the eggs and milk: In a large bowl, beat the eggs with the milk until fully combined. Season with salt and pepper to taste. Stir in the shredded cheese.
- Combine: Pour the egg mixture over the sautéed veggies (and meat, if using) in the skillet. Give it a gentle stir to make sure everything is evenly mixed.
- Cook on the stove: Let it cook on medium heat for about 4-5 minutes, or until you see the edges start to set.
- Bake: Transfer the skillet to the preheated oven. Bake for 10-15 minutes, or until the frittata is set and the top is slightly golden. You can check doneness by inserting a knife in the center; if it comes out clean, it's ready.
- Serve: Let it cool for a few minutes, then slice and serve directly from the skillet. A side salad or some crusty bread makes a great addition!
Feel free to mix up the veggies and cheese based on what you have on hand or your preferences. Frittatas are all about making it your own.