Unroll crescents onto work surface. Top each piece of dough with shredded cheese and a few slices of pepperoni. Sprinkle on a bit more cheese, and roll into crescent shape. Place pizza "moons" on a baking sheet.
Bake until crescents are golden brown, 12 to 15 minutes. Remove from oven, and sprinkle with Parmesan cheese.
Any type of cheese can be used. Try sausage or chicken in place of the pepperoni.