Defrost chicken breast if necessary. Cut tomato slice and set aside. Take a few slices of red onion and grill on grill pan and then set aside. Before you place chicken in grill pan to cook...coat it with 1 tbs of Honey Mustard (you could use a different mustard if you don't like honey) Grill chicken breast in pan until cooked and then set aside. Place cheese on the BOTTOM slice of bun. Then place both pieces of pun in grill pan. Wait for cheese to get warm and grill both sides of top hamburger bun. Put on serving plate. Microwave 2 slices of bacon. Assemble your sandwich. I put additional honey mustard on the chicken breast after cooked. OPTIONAL: Serve with celery sticks and a wedge of low fat blue cheese Laughing Cow Cheese (only 35 calories)! Nutritional Info: 10 grams fat/420 calories, 33g carbs, 42g protein