2 large eggs
3 tablespoons chopped fresh spinach
1 tablespoon whole milk
1 tablespoon crumbled feta cheese
Coat the inside of a 12- to 16-ounce microwave-safe mug with cooking spray. Crack the eggs into the mug and use a fork or small whisk to beat until completely combined. Whisk in the spinach and milk, and season with salt and pepper.
Microwave, uncovered, on high power for 1 minute. Stir the eggs and top with feta. Microwave on high power until the eggs are completely set, 30 to 60 seconds more. Serve immediately.