Flatten each roll into an 8-inch circle. Combine ham, olives, mushrooms, green peppers and cheese. Place 1/4 cup ham mixture on each circle. Fold dough over (like a turnover) and seal edges with a fork. Place on baking sheet sprayed with non-stick cooking spray. Bake at 350 F for 20-25 minutes. Dip in heated pizza sauce, if desired.