Just 20 minutes of prep work, and you'll be ready to plug in your slow cooker for a broth-based soup that's richly seasoned with ginger. Use curly dried Chinese egg noodles, rather than rice sticks or rice noodles, for easier serving.
In a 3 ½- or 4-quart slow cooker combine the beef, beef broth, water, sweet peppers, water chestnuts, scallions, soy sauce, ginger, and black pepper.
Cover and cook on low for 6-8 hours or on high for 3-4 hours. Turn off the cooker and stir in the noodles. Cover and let stand for 5 minutes. If desired, top with scallion strips.