Brown Onion Sauce Recipe
Peel and slice the onions, to which put an equal quantity of cucumber or
celery, with an ounce of butter, and set them on a slow fire; turn the
onions till they are highly browned; stir in half an ounce of flour; add
a little broth, pepper, and salt; boil it up for a few minutes; add a
spoonful of claret or port, and some mushroom ketchup. You may sharpen
it with a little lemon-juice. Rub through a tamis.
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