Use your tuna the same day you buy it. Spicy tuna with crispy rice is best consumed the day you make it, but you can store it in the fridge and eat it the next day. Reheat by adding to a lightly oiled skillet over medium heat for about 3-4 minutes. It’ll warm the rice up just enough without heating the tuna. Or you can alternatively nuke the rice patties in the microwave and then assemble them.