Brown ground beef in a large skillet over medium-high heat. Season with salt and pepper. Drain any grease. Add cooked chopped bacon, Worcestershire sauce, ketchup, minced onion and salt and pepper to beef. Stir to combine.
Reduce heat to low and let mixture heat thoroughly, about 5 minutes or so.
Sprinkle some cheddar cheese down the center of each tortilla. Add a few heaping Tablespoons of the beef mixture on top of cheese. Drizzle a little mustard (and more ketchup, if desired) on top of the beef, and then add a couple tomato slices. Roll up each tortilla burrito-style.
Place wraps, a couple at a time, onto a preheated indoor grill and grill for 3-5 minutes, or until cheese is melted. Carefully remove wraps from grill and place on a plate. Gently unravel wrap to add some lettuce. Re-roll wrap and then cut in center diagonally. Serve immediately and enjoy!