INGREDIENTS
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1 large onion, chopped
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2 carrots, chopped
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2 ribs celery, chopped
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2 teaspoons vegetable oil
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2 large turkey wings
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2 tablespoons cold water
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10 cups cold water
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4 sprigs fresh thyme
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2 cloves garlic (optional)
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3 tablespoons butter
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1/2 cup all-purpose flour
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salt and ground black pepper to taste
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1 pinch cayenne pepper