For an extra layer of flavor, consider adding a pinch of red pepper flakes to the egg mixture. Feel free to experiment with different cheeses, such as Gruyere, Monterey Jack, or pepper jack, to create your own unique flavor profile. If you don't have muffin cups, you can bake this in a small oven-safe dish or ramekin. Adjust baking time as needed. For a vegetarian option, substitute the ham with sauteed mushrooms, spinach, or bell peppers. These egg bowls can be made ahead of time and reheated for a quick and convenient meal. Store in an airtight container in the refrigerator.