In a medium size pot, add the lime leaves, lemongrass, galangal, chopped chilies, chili paste, chili paste oil, fish sauce, lime juice, and all of the seasoning packets that come with the noodles (the chili powder is optional). Add the pork stock (or use 3 cups of the meatball cooking water) and bring to a boil.
4 lime leaves, 1 stalk lemongrass, 10 thin slices galangal, ¼ cup Thai chili paste, 3 tablespoons fish sauce, ¼ cup lime juice, 2 tablespoons chopped Thai chilies, or to taste, 2 tablespoons chili paste oil, 2 packs Creamy Tom Yum Mama noodles, 3 cups pork stock