Oven at 400 degrees.

Refrigerator biscuits
Sauce
Shredded Mozzarella cheese
Pepperoni slices

On a floured surface, roll each biscuit into a 4 inch round. Place rounds on greased cookie sheet(s). Spoon sauce on each. Sprinkle with cheese. Top with pepperoni. Bake 10 to 12 minutes.