Creating an egg frittata is straightforward. Just follow these easy steps:

1. Preheat Oven: Preheat your oven to 350°F (175°C).
2. Prepare Ingredients: Chop the vegetables and protein of your choice, and set them aside.
3. Whisk Eggs and Milk: In a bowl, whisk together the eggs and milk until well combined. Season with salt and pepper.
4. Cook Vegetables: In an oven-safe skillet, heat olive oil or butter over medium heat. Add the diced vegetables and cook until softened, about 5-7 minutes.
5. Add Protein: Stir in your cooked protein and mix well with the vegetables.
6. Pour Egg Mixture: Evenly pour the egg mixture over the cooked ingredients in the skillet. Sprinkle cheese on top.
7. Cook on Stovetop: Allow it to cook on the stovetop without moving for about 5 minutes until the edges are set.
8. Transfer to Oven: Place the skillet in the preheated oven and bake for 15-20 minutes or until the frittata is puffed and golden.
9. Cool & Slice: Remove the skillet from the oven and let it cool slightly before slicing.
10. Serve: Enjoy warm or at room temperature.

By following these straightforward steps, you can create a delicious egg frittata in no time!