When using pepperoni as a pizza topping, often the fat in this sausage will be released as the pizza bakes, causing the pepperoni to be laying in puddles of grease. To remedy this, precook the pepperoni in a microwave to release the fat. This can best be accomplished by placing several layers of paper toweling on a plate and placing the pepperoni on the toweling. To keep the thin slices of pepperoni flat during the mircowaving, place several more layers of paper toweling on top of the pepperoni and use another plate as a weight to press the top layers of paper down onto the pepperoni. Microwave on high for 25 to 35 seconds and remove the pepperoni, taking it off the toweling and placing it on the pizza. Much of the grease normally released will have been removed from the pepperoni slices.