Coat a 2-cup measuring cup or small round microwave-safe bowl with nonstick cooking spray.
2
Break the egg into the cup and scramble, then mix in the cheese. Microwave at high power for 1 minute, or until set (microwave oven temperatures vary, so adjust cooking time according to your microwave).
3
Meanwhile, toast the English muffin or bagel. Place the cooked egg in the English muffin or bagel, and serve.