Spray the inside of a mug with cooking spray or brush it with oil. Crack the eggs into the cup and whisk with a fork. Add the frozen spinach, cheese, garlic powder, salt, and pepper.
Step 2
Stir together until combined. Place the mug in the microwave and cook on high for 1-2 minutes or until the eggs are cooked all the way through. Remove the mug from the microwave carefully, as it will be hot.
Step 3
Let the omelet cool for 2-3 minutes. Serve with your choice of condiments or sides. Enjoy.