"Get this all-star, easy-to-follow Caramelized Vidalia Onion and Potato Gratin with Fresh Sage recipe from Bobby Flay..."
INGREDIENTS
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2 tablespoons olive oil
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1 tablespoon unsalted butter
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3 Vidalia (or other sweet variety) onion, peeled, halved and thinly sliced on a mandoline
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Salt and freshly ground black pepper
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3 tablespoons finely chopped fresh sage leaves
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6 large Idaho potatoes, peeled and sliced thinly on a mandoline
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2 cups heavy cream