My kids made this over and over again during the Passover holiday week. It gets nice and puffed up in the microwave. The cheese is melted and delicious mixed with the eggs.

2 eggs
2 tablespoons milk
2 tablespoons cheddar cheese
Salt and pepper

Coat 12-oz. microwave safe coffee mug with cooking spray. Add eggs and milk; beat until blended.
Microwave on high for 45 seconds; stir. Microwave until eggs are almost set, 30 to 45 seconds longer.
Top with cheese; season with salt and pepper.