This comforting slow-cooker soup is inspired by pho, the traditional Vietnamese noodle dish made with rice noodles and meat, and served in a flavorful, clear broth with a multitude of garnishes. For this recipe, we've used low-sodium chicken broth seasoned with star anise, clove, ginger and cinnamon. Ngo gai (culantro) and onion are also commonly used to flavor the broth. It's perfect for the slow-cooker because pho usually simmers for at least three hours, becoming infused with the flavor of the spices. For garnishing, we've lined up bean sprouts, basil, mint, cilantro, sliced chile and lime wedges, but you could also use cabbage or scallions. One of the best parts of this dish is how customizable it is.