Slice the English Muffin and place in toaster till desired crispness is reached.
While the muffin is toasting, spray a mug or small round plastic container (one with the same diameter as the English Muffin) with non-stick cooking spray and pour in egg whites.
Top egg whites with salt and black pepper and microwave for approx. 1-1.5 minutes.
Place toasted English muffin on a plate and top with egg white, cooked bacon, and cheese.
Microwave assembled sandwich for an additional 20 seconds to melt the cheese.