Use cassoulet in a sentence Cassoulet in a white bowl.cassoulet noun a traditional casserole of SW France, consisting of beans slowly baked with various kinds of meat and, often, a leg of confit of duck or gooseOrigin of cassouletFr; origin, originally , dialect, dialectal diminutive of cassolo, stoneware bowl, diminutive of casso ; from Proven????al cassa: see casserole