What is Mongolian beef on Chinese menu?

Mongolian beef is a popular dish often found on Chinese restaurant menus, particularly in Western countries. It typically consists of tender slices of beef, usually flank steak, stir-fried with green onions and sometimes other vegetables, all coated in a savory sauce made from soy sauce, hoisin sauce, and garlic. Despite its name, the dish is not traditionally Mongolian; it is more of a Chinese-American creation that emphasizes bold flavors and a slightly sweet profile. It's commonly served over rice or noodles.