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
Frankfurter Würstchen in Germany since about 1860. Since 1929, the indication is only allowed to be used for sausages that are in fact produced in the Frankfurt area, mainly in Neu-Isenburg and Dreieich. Originally, Frankfurters were made without nitrite curing salt. After the special ageing and smoking methods, the sausages, now of a golden colour, are put into wooden boxes with small parchment paper between layers. Therefore, the traditional sausages are square in shape but there are a few exceptions where the sausage is circular. Outside Germany, "frankfurter" is a common designation for boiled sausages, such as North American hot dogs, which