Preheat your toaster oven to 400°F.
If using, lightly butter one side of each bread slice or spray with nonstick spray.
Use a spoon to gently press down the center of each bread slice to make a well.
Crack an egg into each bread well carefully to avoid overflow.
Sprinkle shredded cheese evenly over the eggs.
Season with salt and black pepper to taste.
Bake in the toaster oven for 10 to 12 minutes, or until the egg whites are set and yolks are to your desired doneness.
Serve warm.