The condition for eating free casserole on your birthday at Fatty's is to bring your ID card. There are various flavors of boiled rice for consumers to choose from, including meat loaf, beef, sausage, large intestine, chicken wings, etc. The most popular flavor is meat loaf. Consumers can enjoy the hot boiled rice in the store or choose to pack it up and take it away. It should be noted that the free birthday casserole may vary from region to region or store to store, and you need to consult your local Fatty's store for details.