Preheat oven to 350°F. Coat a 9x13 baking dish with cooking spray.
Place 1/2 crescent dough (1 can) in a single layer.
Layer the cheese, ham, cheese and ham. Finish with a single layer of crescent dough. Reserve a small amount of cheese for sprinkling on top, if desired.
Bake for 20-25 minutes. If the tops starts to brown, loosely place a sheet of aluminum foil over top so the bottom layer has time to cook as well.
If you are sprinkling cheese on top, sprinkle right after removing from the oven. Cheese should melt with heat from the top layer.
Remove and allow to sit for 5 minutes.
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