Use your leftover spaghetti sauce to create new meals that don't have anything to do with pasta.
Pick up some premade pizza dough (or make your own) and throw together a gourmet pizza, using your sauce as the base. Top with whatever you have lying around in the fridge. Be creative!
Pizza burgers are always a family favorite. Just top your grilled burgers with mozzarella cheese and warmed up sauce. Forgo the bun and use garlic bread for a more Italian flavor.
Spaghetti sauce is also great as a topping for stuffed peppers. Slice off the tops of some green bell peppers. Clean out the seeds and stuff the peppers with a mixture of ground beef, cooked rice and sauce. Cover with foil and bake until heated through. Melt a bit of mozzarella cheese on top, and you're done.