Cut the block of cheese into at least 28 squares.Flatten a biscuit out and stack pepperoni and cheese on top.Gather up the edges of the biscuit.Line the rolls up (seam side down) in a greased 9×13 in. pan.Brush with beaten egg.Sprinkle with Parmesan, Italian seasoning and garlic powder.Bake at 425°F for 18-20 minutes.Serve the rolls with warm pizza sauce for dipping.