Add all ingredients but the noodles to a large pot. Bring to a boil, then reduce to a simmer and cover for 10 minutes. Cut up the noodles and stir them in. Use a spoon to break them apart. Taste and season with soy sauce, lime juice, and fish sauce to taste. (I used about 1 tablespoon of soy sauce, the juice of half of a large lime, and 2 teaspoons of fish sauce).