IKEA Swedish meatballs can be heated in the microwave or steamed in water. Frozen fried meatballs show cooked meatballs, which are convenient to eat after freezing. If you have a microwave oven at home, you can put it on a plate and microwave it for three or four minutes. If there is no microwave oven, you can also use a steamer. Put cold water under it and cook for seven or eight minutes.