You can reheat risotto easily and it still tastes delicious the next day. Risotto will keep for up to five days in the refrigerator although you can also use the leftover risotto to make delicious Arancini balls. To reheat, place a small amount of water or bone broth into a pot or pan on medium heat — just enough to barely cover the surface. Add the risotto and stir gently until it gets hot but doesn't boil.