Pho is served in a bowl with a specific cut of flat rice noodles in clear beef broth, with thin cuts of beef (steak, fatty flank, lean flank, brisket). Variations feature slow-cooked tendon, tripe, or meatballs in southern Vietnam. Chicken pho is made using the same spices as beef, but the broth is made using chicken bones andmeat, as well as some internal organs of the chicken, such as the heart, the undeveloped eggs, and the gizzard.