Pre-Sliced Pepperoni Slices
Paper Towels
On a microwave safe plate, line with several sheets of paper towels. Lay out the pepperoni slices in one even layer, and nuke in the micro for about a min (depending on wattage of your oven). They will get nice a crispy and most of the grease will be absorbed by the paper towel.
If any in the center are not crispy looking and still feel soft, nuke again in about 15 sec increments.