Place bread on a broiler safe pan. Top each slice of bread with a slice of cheese then a slice of tomato. Depending on how big your tomato slice is you may want to put on two but keep it a single layer of tomato. Cut each slice of bacon into 2 pieces. Then lay 3 of the pieces on each sandwich. Broil until bacon is crisp and cheese melted. Bread and cheese may get a little burnt. That makes it better!
Note: Originally I put raw bacon on the sandwich and cooked it all the way under the broiler. Now I cut the strips in half and partiality cook in micro-wave and then put on sandwich and broil to finish cooking.