In a medium pot, toast the star anise and cinnamon stick over medium heat for 2 minutes until aromatic.
Add the beef bone broth, sliced ginger, and fish sauce to the pot; bring to a gentle boil, then reduce heat and simmer for 15 minutes.
While the broth simmers, prepare the rice noodles according to package instructions, drain, and set aside.
Place the eye of round beef in the freezer for 10 minutes to firm up, then slice it against the grain into paper-thin pieces.
Remove the star anise, cinnamon, and ginger from the broth using a slotted spoon, and season with sea salt and black pepper.
Divide the cooked noodles into a large bowl and top with the raw, thinly sliced beef.
Pour the boiling hot broth over the beef and noodles, which will cook the thin beef slices instantly.
Top the bowl with bean sprouts, fresh cilantro, Thai basil, and sliced green onions.
Serve immediately with a fresh squeeze of lime juice.