The legs, or brown meat, of a chicken ... or thighs. The thighs are sold prepared in a variety of ways: whole; on the bone with the skin on; off the bone with the skin on; or boneless and skinless ...
If you can only find smaller chicken thighs, you might want to add a few extra (they often come in packs of eight in supermarkets). Or use chicken breasts if you prefer. This dish freezes well.