While the world is nuts about phở, my Vietnamese noodle/broth combination of choice is bò kho.
Bò kho is a beef stew deeply infused with star anise and lemongrass. The hunks of meat and carrots in bò kho are tender as can be due to hours of simmering.
Back in California, my family ate bò kho with a wide(ish) rice noodle that sometimes veered toward tender. In Saigon, bò kho is served with a thinner and more al dente rice noodle.
The fabulous bowl of bò kho featured up top is from a hidden stall on Ton That Thuyet Street in District 4. The Astronomer and I, along with his sister Rosalind and gas•tron•o•my reader Shay from LA (!), shared two bowls (10,000 VND each) on our early morning food tour today.