Heat oven to 350°F. Spray 10 muffin tins with nonstick cooking spray. Place one round of Canadian bacon in each cup, pressing to line sides and bottom. (You may need to slightly fold the edges.) One at a time, crack eggs and place in Canadian bacon “cups,” one egg per cup. Sprinkle each with 1/2 tablespoon cheese.
Bake in the preheated oven until eggs are done to your liking, 12-18 minutes. Sprinkle with fresh parsley, if desired.