1. For filling, in a bowl combine mozzarella cheese, pepperoni, and pizza sauce. Set aside.
2. Separate biscuits. Flatten biscuits to 3-inch circles. Place about 1 rounded tbs filling in the center of each circle. Bring edges of dough together. Pinch to seal.
3. Place, seam side down, on greased baking sheets. Brush with milk. Sprinkle with Parmesan. Bake in a 350 oven for 12-15 minutes or till golden. Serve warm.