"We made it our business to create an excellent gravy with store-bought broth—no ham hocks, chicken parts, or hours-long simmering involved. Since that went so well, we decided it should also be finished two days before the big day. You're welcome...."
INGREDIENTS
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1 Tbsp. (or more) vegetable oil
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1 turkey neck (reserved from Dry-Rubbed Roast Turkey), patted dry
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1 cup chopped shiitake mushrooms
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1 medium onion, finely chopped
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A small handful of rosemary sprigs, thyme sprigs, and/or bay leaves
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1/2 cup dry white wine
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6 cups (or more) low-sodium chicken broth or turkey stock
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3 Tbsp. unsalted butter
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1/4 cup Wondra or all-purpose flour
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1 tsp. soy sauce
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Kosher salt, freshly ground pepper