Best meatball sandwich ever thanks to leftovers from 2 Genius Recipes! (Rao's Meatballs + Tomato Sauce with Butter and Onion). & homemade sourdough bread doesn't hurt either ;)
Toast up some thick slices of crusty bread, top with reheated leftover meatballs and sliced fresh mozzarella-- toss under the broiler for a few minutes to get some melty goodness and sprinkle with torn basil. Enjoy!