Prepare pasta according to the instructions on the container. Rinse and drain using lukewarm water
Blend together the cooled pasta, pepperoni, olives, and cheese in a large basin.
To the pasta salad, add at least half of the Italian dressing and incorporate thoroughly.
Mix in any desired ingredients thoroughly with the pasta salad.
Refrigerate for a minimum of two hours. Before serving, stir in additional dressing to flavor.