1. Mix ground beef lightly with salt and pepper; shape into 4 patties about 1-inch thick.
2. Pan-fry over medium heat 8 minutes on each side for medium, or until meat is done as you like it. Brush tops lightly with catsup; cover each burger with a cheese slice. (Heat from meat will melt cheese).
3.Top each with a tomato and onion slice; put together, sandwich style, on buttered buns which have first been topped with one slice each of green pepper, onion, tomato and cheese. Top each cheeseburger with a crisp slice of bacon.