Slow Cooker Mongolian Beef is a convenient and easy way to enjoy this delicious dish without much effort. The beef is marinated and then cooked in a slow cooker for several hours, allowing the flavors to meld together and the meat to become tender and juicy. This recipe is perfect for busy days when you want a flavorful meal waiting for you at the end of the day. Serve it with steamed vegetables and rice for a complete and satisfying meal.