Preheat oven to 350 degrees. Thoroughly spray miniature muffin pan with cooking spray or grease with butter.
In a large measuring cup or bowl, whisk together eggs, milk, salt, and pepper.
Pour egg mixture into prepared pan, filling cups about ⅔ full.
Sprinkle cheese evenly among the cups. Bake for approximately 8-10 minutes, or until eggs set.
Allow to cool in pan for a few minutes before removing to a wire rack. When completely cooled, muffins can be wrapped in plastic and frozen.
When ready to eat, simply microwave each mini muffin for 15-30 seconds, or until heated through.