01If not serving immediately: Heat oven to 200 degrees F.
02In bowl, toss together cheese and pepperoni; set aside.
03On floured work surface, roll or stretch each biscuit into approximately 3 ½ inch circle. Moisten half of edge with water and place heaping teaspoon of filling in center. Fold circle in half over filling, pressing edges firmly together to seal.
04Place large skillet over medium-low heat until hot. Brush skillet with oil and add as many filled biscuits as will fit. Cook until browned on underside, approximately 2 minutes.
05Turn biscuits over and cook second side until browned and cooked through to center, approximately 2 minutes.
06Transfer filled biscuits to serving platter, brush skillet again and repeat with remaining biscuits (keep cooked ones warm in oven).
07Serve plain or with a bowl of marinara sauce for dipping.