Baked sushi is the best served hot out of the oven. However, it can also be served at room temperature or even cold. If you have leftovers, you can reheat baked sushi using many different cooking methods. Choose an option that is easy and convenient for you. Air Fryer – Preheat the air fryer to 375 Degrees F (190 degrees C) and air fry covered for about 5 minutes or until toasty warm all the way through. Oven – Preheat the oven to 350 degrees F (175 degrees C) in the original baking pan or baking sheet and cover with aluminum foil so it does not dry out. Bake for about 10 to 15 minutes or heated through. Microwave – Place a slice of crab sushi bake on a microwave save plate. Cover to prevent splattering and microwave on high for 30 to 45 seconds or until heated through.