The first step is to spread the baking dish with unsalted butter (soft or melted) and brush it around your dish. Then, add the eggs to the dish. You can add as many eggs as you can fit, depending on the size of the dish. In this recipe, I use two eggs per dish.
Next, add your preferred mix-ins. For this recipe, I made a few versions of this dish to give you some ideas. However, YOU are the boss on what to add to your dish! I decided to add some mushrooms, which I sauteed first for just a few minutes.
Add grape tomatoes, green onions, white onion, peppers, basil, chives, crushed red peppers (optional). Add salt & pepper. a pinch goes a long way!
Bake for 10 to 15 minutes, depending on dish size. Make sure to read the above tips in the post about the time when baking eggs.