Preheat oven to 350.
To bake in a glass baking dish:
Butter a 13X9 baking dish.
To bake in a cast iron pan:
Place a cast iron over medium heat and melt a tablespoon of butter in the pan.
For either:
In a large bowl beat the eggs lightly with a whisk.
Add all the salt, garlic powder, onion powder and paprika and beat with a whisk until incorporated into the eggs.
Add the cheese and whisk until combined.
Add the peppers and whisk until combined.
Add any optional ingredients.
To bake in a glass baking dish:
Pour egg mixture into the buttered baking dish.
Place dish in the oven.
Cook for 28-30 minutes or until center is cooked through. Don't over bake!
To bake in a cast iron pan:
Pour Egg mixture into the cast iron pan.
Cook until the edges of the frittata are set.
Place pan in oven for 20-25 minutes. Don't over bake!