Ham and cheese omelet:

3 large eggs
A pinch of pepper
Salt
Milk
2 slices of Black Forest ham
3-4 tablespoons of Jarlsberg cheese
1 1/2 tablespoons of chopped onion

Mexican omelet:

3 eggs
Milk
Pepper
1/4 cup of Salsa
1/2 cup of Pepper Jack cheese

Salmon and goat cheese omelet:

3 eggs
Salt
Pepper
1-2 ounces of smoked salmon
1-2 ounces of goat cheese

Egg white and shitake mushroom omelet:

2 egg whites
Feta cheese
2-3 Shitake mushrooms
1 cup of Spinach

Frittata omelet:

Leeks
2-3 potatoes
2 tablespoons of Parsley
2 tablespoons of butter
Salt
Pepper
Gruyere cheese
8 eggs
1/2 cup of heavy cream