Using a cover or circle of some sort, cut tortillas into circles. Push circles into prepared pan, overlapping edges of tortilla pieces, if necessary.
In a bowl, combine eggs, sour cream, half of the cheese, salt and pepper. Carefully pour into tortilla cups.
Top each desired toppings like ham, onions and green pepper.
Bake for 12-15 minutes.
Top with remaining cheese and bake for 5 more minutes.
Carefully remove from muffin cups. Serve hot with salsa, if desired.