1. Arrange bacon on a roast rack set in a 2-quart glass baking dish. Cover with a paper towel. Cook in microwave oven 5 minutes at HIGH.
2. Meanwhile, toast bread and lightly spread with butter.
3. Put toast on roast rack and top with bacon pieces. Put a tomato slice on each toast slice, and then a slice of cheese. Heat uncovered in microwave oven 2 minutes at SIMMER, or until cheese melts. Serve immediately.