Add the beans and broth and simmer over moderately high heat until the broth is reduced by half, about 5 minutes; discard the thyme sprig. Puree the bean mixture in a blender. Season the puree ...

Half of the beans are simmered in broth to bring out their hyper savory flavors and the rest are baked into the casserole to maintain their color and structure. In a medium saucepan, add chicken ...