INGREDIENTS
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1 tablespoon unsalted butter
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1 small onion, halved and sliced thin
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1 1/2 pounds russet potatoes, peeled and sliced 1/8 inch thick
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1 cup heavy cream
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3/4 teaspoon salt
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1/4 teaspoon pepper
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1 9-ounce box frozen artichokes, thawed and choked
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1 cup shredded Gruyère cheese