AURORA SAUCE
Add one half cupful of mushroom liquor to one cupful of Béchamel Sauce. Add also three tablespoonfuls of stewed and strained tomatoes, and one tablespoonful of butter. Reheat, add a few cooked mushrooms cut into dice, and serve.
AVIGNONNAISE SAUCE
Chop together four shallots and two beans of garlic. Fry in olive-oil, add two cupfuls of Béchamel Sauce, bring to the boil, add the yolks of three eggs, two tablespoonfuls of grated Parmesan cheese, and a little minced parsley. Heat, but do not boil, and use as soon as it thickens.