Chop the onions, roast them light yellow in the butter and then dust with flour and let them brown, then add the stock. Season with salt and pepper and cook until soft. Put the thinly sliced bread, the grated cheese (1 tablespoon per person) and some cream in a bowl. Pour the onion soup over it. If you don`t like the onion pieces, you can also strain the broth. It is best to portion the soup straight away in soup bowls.