Spray a custard sized microwave-safe dish with cooking spray (bottom and sides). Crack two eggs into dish, and add water, salt and pepper. Mix ingredients together with a fork until combined.
Cut a couple thin slices of ham into small pieces (I used thinly sliced deli ham - if using a piece of ham from a large ham, cut it into very small cubes). Grate cheddar cheese. Add ham pieces and grated cheddar cheese to egg mixture, and stir well, to combine.
Place dish in microwave. Microwave on high for 1-2 minutes, or until it is cooked through in the center (mine cooked in 1 minute 45 seconds). Since microwave temps vary a bit, check the omelet after one minute. If there is still liquid present, stick it back in the microwave for another 30-45 seconds, then check again. When done, remove from microwave... and enjoy!
Microwaved Ham and Cheese Omelet https://www.thegratefulgirlcooks.com/microwaved-ham-cheese-omelet/