In a medium pot, combine beef bone broth, star anise, cinnamon stick, and sliced fresh ginger.
Bring the broth to a boil, then reduce heat and simmer for 10 minutes to infuse the flavors.
While the broth simmers, cook the brown rice noodles in a separate pot according to package directions until tender.
Drain the noodles and place them into a large serving bowl.
Thinly slice the raw flank steak against the grain into very thin pieces and arrange them on top of the noodles.
Remove the whole spices from the broth, stir in the fish sauce, sea salt, and black pepper, and bring to a rolling boil.
Pour the boiling broth over the steak and noodles, which will cook the thin beef slices instantly.
Garnish the soup with bean sprouts, fresh basil, cilantro, and jalapeño slices.
Serve immediately with a fresh squeeze of lime juice.