To make, spoon 1-cup of prepared spaghetti sauce into a 9 x 13-inch casserole dish.

Layer 12 ounces, or half a pack, of frozen cheese ravioli over the sauce. Top with 4 ounces, or half of a standard-size bag, or shredded part-skim mozzarella cheese.

Pour another cup of sauce over all. Layer the remaining ravioli and top with remaining sauce.

Bake for 35 minutes at 425 degrees and sprinkle with remaining cheese. Bake until bubbly, another five minutes.