Chop the ingredients. Cut them into medium-sized pieces so that they’ll sauté quickly.
Crack the eggs. Crack ‘em into a 2 cup measuring cup if you have one add milk or cream and whisk.
Preheat oven to 350°F.
In an oven-safe skillet, sauté the onions and any ingredient that takes longer to sauté.
Add remaining vegetables and sauté over medium heat until everything is cooked through.
Add the egg mixture and season with salt and pepper.
Top with cheese and bake 10-15 minutes or until the eggs have completely set and the cheese has started to bubble.