Cassoulet only beans, tomato sauce, sausages, and bacon. More expensive versions are likely to be cooked with goose fat and to include Toulouse sausages, lamb, goose, or duck confit. Haute cuisine versions require mixing pre-cooked roasted meats with beans that have been simmered separately with aromatic vegetables, but this runs counter to cassoulet's peasant origins. In the process of preparing the dish it is traditional to deglaze the pot from the previous cassoulet in order to give a base for the next one. This has led to stories, such as the one given by Elizabeth David, citing Anatole France, of a
Glamorgan sausage making the sausages on an hourly basis, and referenced other makers of the sausages making theirs days in advance prior to sale. The advert makes it clear that the sausages were made from "choice dairy-fed pork". Glamorgan sausages are thought to have been originally made with Glamorgan cheese which is no longer made due to the near-extinction of the Glamorgan cattle from which it was produced. They rose in popularity during the Second World War due to rationing limiting the volume of meat. The Welsh Gas Board promoted the sausage in a cookbook published in the 1950s, in which it