Spray a small skillet with cooking spray and fry the egg to your liking, remove to a plate

Slice the cheese and place a layer on both slices of bread

Place each individually into the microwave for 15 to 20 seconds until the cheese starts to soften

Melt 1/2 tbsp butter in the same skillet on medium heat and add one of the bread slices (cheese side up), cook until browned, 1 1/2 minutes

Place the cooked egg and the second slice of bread with softened cheese on top of the slice in the skillet

Use a spatula to lift the sandwich, then add another 1/2 tbsp butter to the pan and gently turn the uncooked bread slice into the skillet, cook for 1 to 1 1/2 minutes until browned

Serve the hot sandwich right away