Cook your bacon, either fry it up or bake it in the oven until it's "Chewy" don't get it too crispy because it will crisp up more when you put it under the broiler. Then start your cheese sauce. Melt the butter in a small sauce pan, add the flour and let it cook for a minute or two to get out the raw taste, then add your milk, nutmeg, salt and cheese. Whisk together and stir occasionally as it thickens up. Give your bread slices a quick toast under the broiler, if you don't it will get soggy when you put this all together. Lay the bread slices in the bottom of a 9 X 6 casserole dish and top with the slices of turkey, ham, and tomatoes. Your ham and turkey slices should cover two pieces of bread. Pour the cheese sauce over the top and sprinkle with about an ounce of the shredded Swiss cheese. I by an 8 oz package of cheese and use about 7 oz in the sauce and the rest of it tops off the dish. Place the bacon slices on top of the cheese sauce and put it under the broiler about 6" from the heat source and broil until the cheese has started to turn golden brown and everything is bubbling. About 10 minutes.