A deeply aromatic, slow-simmered bone broth perfumed with charred ginger, star anise, and cinnamon, ladled over silky noodles and fresh herbs.
Simmer the stock with lemongrass, ginger, and half the chilies for 25 minutes.
Stir in fish sauce and sugar, then strain.
Poach the chicken thighs in the broth for 20 minutes, then shred the meat.
Divide noodles between bowls, top with the shredded chicken, and ladle over the broth.
Scatter over the remaining birdseye chilies and serve with lime.