Bring broth, ginger, garlic, and soy to simmer in a large pot. Add noodles and cook, using a fork to break up the strands, until almost tender, about 3 minutes. Add Vegetables; simmer until crisp-tender, about 2 minutes. Add bean sprouts or cabbage slices; continue to simmer until they just start to wilt, about a minute longer. Serve immediately with some of the suggested toppings*.