Remove the thighs and chop them into 1-2 cm chunks, then return the meat to the pot. Taste the broth and adjust with salt if necessary.
Dilute the miso with a little hot broth and whisk it into the soup. Add the spinach and let wilt slightly, then add the leeks and the snap peas and let them warm for 1 minute. Divide the noodles among the warmed bowls and ladle the soup over. Top each bowl with a little basil.
Recipe by David Ranis on https://www.nytimes.com/2015/04/08/dining/a-spring-chicken-soup-with-miso.html
Photography by Evan Sung for The New York Times