Bakso or baso is Indonesian meatball or meat paste made from beef surimi and is similar in texture to the Chinese beef ball, fish ball, or pork ball. Bakso is commonly made from beef with a small quantity of tapioca flour, however bakso can also be made from other ingredients, such as chicken, fish, or shrimp.

Bakso are usually served in a bowl of beef broth, with yellow noodles, bihun (rice vermicelli), salted vegetables, tofu, egg (wrapped within bakso), Chinese green cabbage, bean sprout, siomay or steamed meat dumpling, and crisp wonton, sprinkled with fried shallots and celery. Bakso can be found all across Indonesia; from the traveling cart street vendors to restaurants. Today various types of ready to cook bakso also available as frozen food commonly sold in supermarkets in Indonesia. Slices of bakso often used and mixed as compliments in mi goreng, nasi goreng, or cap cai recipes.

Unlike other meatball recipes, bakso has a consistent firm, dense, homogeneous texture due to the polymerization of myosin in the beef surimi.
Indonesian Bakso is also known as Obama's favourite childhood dish.

source : here