Mushroom Sauce

Ingredients

• 1 pint fine young button mushrooms
• white veal gravy
• salt
• pepper
• 1 blade of mace
• 1/2 lemon peel, grated
• flour
• 1 egg yolk
• cream

Instructions

1. Take about a pint of fine young button mushrooms.
2. Let them stew gently in a white veal gravy seasoned with salt, pepper, a blade of mace, and, if approved, the grated peel of half a lemon.
3. It should be thickened with flour, and the yolk of an egg stirred in it just before serving.
4. English cooks add cream to this sauce.