COAT 12-oz. microwave-safe coffee mug with cooking spray. ADD egg, water, mushrooms and ham; BEAT until blended. MICROWAVE on HIGH 30 seconds; STIR. MICROWAVE until egg is almost set, 30 to 45 seconds longer.
SEASON with salt and pepper if desired. TOP with cheese. SERVE immediately.
Change up recipe by substituting chopped turkey and cheddar cheese.
This recipe is an excellent source of protein and choline, and a good source of vitamin A.
Microwave ovens vary. Cooking times may need to be adjusted.