1 10-ounce tube refrigerated pizza dough
1 cup part-skim ricotta cheese
1 cup shredded mozzarella cheese
1/4 cup sliced pepperoni, cut into small pieces
1 tablespoon cornstarch
1 cup marinara sauce (more if you prefer)
Preheat oven to 400 degrees. Grease large cookie sheet. On cookie sheet, unroll pizza dough. Press dough into 14-by-8-inch rectangle.
In a large bowl, combine ricotta, mozzarella, pepperoni and cornstarch. Spread cheese mixture on long side of dough to cover half of dough, leaving a 1-inch border. Spoon half of the marinara sauce over cheese mixture. Fold other half of dough over filling. Pinch edges together to seal well.
Cut four slits in the top of the calzone to allow steam to escape during baking. Bake on a cookie sheet on the bottom oven rack for 16 to 20 minutes or until golden. Serve with remaining marinara sauce.