Heat oven to 375°F. Place the 1 pound meatballs on aluminum foil-lined baking sheet coated lightly with nonstick cooking spray. Bake 15 minutes; gently turn meatballs over and bake an additional 8 to 10 minutes until internal temperature reaches at least 175°F.
Meanwhile, cook pasta in boiling water just a few minutes less than called for on the package. Drain well.
Pour 1 pound dry pasta into a casserole dish (9”x13” pan size), add 24 ounces marinara sauce and half of the 2 cups mozzarella cheese and mix well.
Add the meatballs on top and add the remaining cheese.
Bake until cheese is bubbly and brown (about 15 minutes)