Follow these simple steps to create your delicious Simple Egg Frittatas:

1. Preheat the Oven: Preheat your oven to 375°F (190°C) to prepare for baking.
2. Whisk Eggs: In a large mixing bowl, whisk together the eggs and milk until well combined.
3. Add Seasoning: Stir in the salt and black pepper, blending them evenly into the egg mixture.
4. Sauté Vegetables: In an oven-safe skillet, heat olive oil over medium heat. Add your chopped vegetables and sauté for 5 minutes until they soften.
5. Combine: Pour the egg mixture over the sautéed vegetables in the skillet. Make sure the vegetables are evenly distributed.
6. Add Cheese: Sprinkle the shredded cheese evenly over the top of the mixture.
7. Cook on Stovetop: Cook for about 5 minutes on the stovetop until the edges start to set.
8. Transfer to Oven: Place the skillet in the preheated oven and bake for 15-20 minutes, or until the center is set and the top is lightly golden.
9. Cool and Slice: Once done, remove the frittata from the oven and let it cool for a few minutes. Cut into wedges for serving.

These straightforward steps will result in a beautiful and delightful frittata that everyone will enjoy!