Sweet Potato and Caramelized Onion Gratin

Name: Sweet Potato and Caramelized Onion Gratin
Yield: 10
Ingredients: 2 tablespoons butter; 3 medium onions, cut into 1/4-inch slices; 1 3/4 teaspoons salt; 1 tablespoon balsamic vinegar; 3 cups heavy whipping cream; 2 sprigs fresh thyme; 2 sprigs fresh sage; 2 cloves garlic, crushed; 1/2 teaspoon ground black pepper; 2 1/2 lb sweet potatoes, peeled, cut into 1/4-inch slices; 1 lb Yukon Gold potatoes, peeled, cut into 1/4-inch slices; 2/3 cup grated Parmesan cheese

Sweet Potato and Caramelized Onion Gratin was pinched from <a href="http://www.tablespoon.com/recipes/sweet-potato-and-caramelized-onion-gratin/6b4d218e-ceee-4782-93cd-26525a601924" target="_blank">www.tablespoon.com.</a>

"If a family fight broke out over the last bite of this dish, we wouldn’t be at all surprised. When sweet potatoes are layered with caramelized onions and Parmesan cheese, then bathed in cream and baked to bubbly, golden perfection, the results are that good...."

INGREDIENTS

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2 tablespoons butter

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3 medium onions, cut into 1/4-inch slices

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1 3/4 teaspoons salt

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1 tablespoon balsamic vinegar

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3 cups heavy whipping cream

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2 sprigs fresh thyme

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2 sprigs fresh sage

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2 cloves garlic, crushed

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1/2 teaspoon ground black pepper

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2 1/2 lb sweet potatoes, peeled, cut into 1/4-inch slices

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1 lb Yukon Gold potatoes, peeled, cut into 1/4-inch slices

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2/3 cup grated Parmesan cheese

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