John Barricelli shows you how to make an easy and healthy breakfast sandwich.
Preheat oven (or toaster oven) to 400 degrees. Split English muffin; toast directly on oven rack. Transfer to a rimmed baking sheet (or toaster-oven tray). Spread muffin halves with butter.
Layer bottom half with Canadian bacon, Swiss cheese, and tomato; sprinkle with coarse salt and ground pepper. Return to oven; bake until cheese has melted, about 5 minutes. Top with other muffin half.