Bread soup is a soup made with bread as a primary ingredient. It is a popular dish in many cultures and dates back to ancient times. There are many variations of bread soup, but the basic components are bread, water or broth, and vegetables. Sometimes meat, cheese, or eggs are added to the soup as well.
Thinly slice the bread. Cook together with the chopped onion in the butter until golden brown and then sprinkle with the flour. Add the stock, season with salt, pepper and nutmeg and cook for about 20 minutes. Strain the soup through a sieve and bring back to the boil. Serve with grated cheese.