1. Heat oven to 375?F. Separate dough into 4 rectangles; firmly press perforations to seal. Press or roll into four 7x5-inch rectangles. Arrange 9 pepperoni slices in center third of each rectangle. Spread 1 tablespoon spaghetti sauce over pepperoni.
2. Fold each slice of cheese in half; place over pepperoni. Fold short sides of dough to almost meet in center; securely pinch edges together, leaving middle open. Tuck 4 or 5 pepperoni slices into middle opening. Place on ungreased cookie sheet.
3. Bake at 375?F. for 13 to 16 minutes or until golden brown.