INGREDIENTS
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2 8 ounce packages dried cheese-filled tortellini
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3 tablespoons finely chopped red onion
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2 tablespoons finely chopped shallots
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1 tablespoon butter
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2 cups half-and-half or light cream
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1/2 cup milk
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2 egg yolks
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1/4 cup grated Parmesan cheese
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1 tablespoon snipped fresh sage or 1 teaspoon dried sage, crushed
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1/4 teaspoon ground black pepper
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1/2 cup shredded Gruyere or Swiss cheese (2 ounces)
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1/2 cup walnut pieces
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2 ounces prosciutto, finely snipped, or cooked ham, finely chopped