Ingredients: Half an ounce of butter.

Half an ounce of flour.

One gill of vegetable stock.

One onion.

Mushroom ketchup. Method: Put the butter in the saucepan and brown gradually, stirring in the flour carefully.

When this is well browned, add to it the onion (which should be burnt or fried on the outside), the toast, and the vegetable stock and mushroom ketchup.