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Makes 1 Quart
Heat oil and butter in a large casserole over medium-high heat. Stir in onions and cook until golden brown, stirring often. Add the diluted Glace de Canard Gold®, vinegar, and thyme to onions, bring to a boil, and cook until liquid coats the onions, stirring often. Season with salt and pepper. Transfer to glass jars and refrigerate.
This recipe was provided by The Spice House.