Prepare using reduced-sodium spaghetti sauce.
Assemble recipe as directed. Refrigerate up to 24 hours. When ready to serve, bake, covered, in 400°F oven 35 min. or until heated through.
Reserve 1/2 cup of the mozzarella. Assemble recipe as directed, but do not top with the reserved mozzarella. Wrap casserole in foil; freeze. When ready to serve, heat oven to 400°F. Unwrap casserole; cover with foil. Bake 55 min. or until heated through, removing foil after 30 min. Top with reserved mozzarella; bake 2 min. or until melted.