It may sound like sacrilege, and granted, I've only made a couple of these, but I slice them into 1 - 1.5" slices, and give them about 30 - 45 seconds in my microwave on the re-heat setting. If the bacon softens too much, they go in a black iron skillet to crisp up. The outer layer of meat is pretty thin,and the inner layer is usually cream cheese, mushrooms and onions, so it really just takes seconds.
I like the leftovers with eggs in the morning, myself. Great start to the day.