add the broth to a medium pot and toss in the ginger, galangal, lemongrass and keffir lime leaves. Bruise each ingredient with a mortar and pestle to maximize the flavor. Simmer covered for 45 minutes. Add fish sauce to taste
Meanwhile prepare the rice noodles according to package instructions and place in bowl of cold water until needed.
Rinse and gather all the toppings.
Assemble to bowl
Add a mound of cooked rice noodles. Top with raw beef.
Ladle boiling broth on top of beef. The meat will immediately turn gray as it cooks in the heat.
Add as many herbs and toppings as you’d like.
Topping ideas – torn or chopped to taste:
mint, cilantro, lettuce, thai basil, green onion, lime wedges, chopped tomatoes, Thai chilies, fish sauce, sprouts, etc.