In Thailand, you can spot a Kow Mun Gai street vendor by the pale boiled chickens hanging by their necks in a glass case. Kow Mun Gai is a very popular Thai lunch and also late night snack.
When I was growing up, there was a very good Kow Mun Gai vendor near our house. Their Kow Mun Gai was great in large part because their sauce was punchy and strong. You could tell that they were popular. They started the morning with their glass case absolutely stuffed with the chickens. By the early afternoon, the chickens were all gone.
Kow Mun Gai is supposed to be served with yellow bean sauce and winter melon soup. Many restaurants and street vendors now serve just the broth without winter melon to keep the costs down.