16. Mushroom Sauce.
Cut up a very small onion, chop one bead of garlic, and fry in three ounces of butter, to which add a tablespoon of flour. Fry till brown. Add half a pint of water, stir, and let it thicken. Strain. Add salt and Nepaul pepper to taste, and about six good-sized mushrooms that have been peeled and picked and chopped. Let it simmer for about ten minutes very gently, and just before serving add a tablespoon of mushroom ketchup and a squeeze of lemon.