Vegetable Soup No. 1

Directions

1. Cut up the vegetables into thin slices, boil them in the water for two hours and a half, stirring often; mix up in a basin the butter in mustard, flour, salt and pepper, with a little cold water, and stir this into the soup: boil ten minutes.
2. Beat up the yolks of eggs in a tureen and pour the soup boiling on them; stir well.