By Bruce and Jeanne Lubin, Quick and Dirty TipsWhat's the best way to reheat your leftovers? Heat them in your toaster oven or oven on a greased cookie sheet at 450ºF. If you’re reheating something like meatballs, also try reheating them in sauce. The best way to Reheat RicePlace the rice in its original container or in a microwave-safe bowl. 5. reheating PastaThe best way to reheat pasta is right in its sauce.