Mini Fiesta Frittatas

In a large bowl, whisk together eggs, milk, salt, and pepper. Stir in ham, cheese, zucchini, and red bell pepper.

Grease a 12-cup regular muffin pan with oil. Using a ladle, fill muffin cups with egg mixture until three-fourths full.

Bake in a preheated 375ºF oven until mixture puffs and sets in the center, about 10 to 12 minutes. Using a rubber spatula, loosen frittatas from the muffin cups and transfer to a platter.