The broth's deep red-orange color comes from annatto seed oil, not chili — the dish looks fiery but is only mildly spicy underneath.
Thick round rice noodles sit in a broth colored deep red-orange with annatto oil and lightly thickened, topped with quail eggs, fried pork skin, crab paste, and herbs, then finished with a squeeze of lime. Street stalls around Buôn Ma Thuột's markets serve it as an afternoon snack, distinct from any noodle soup found elsewhere in Vietnam.