INGREDIENTS
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Cooking spray
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1 Tbs Butter
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3 1/2 cups chopped onion
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4 ounces Gruyère cheese, shredded and divided
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2 tablespoons chopped fresh chives, divided
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1/3 cup canola mayonnaise
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1/3 cup fat-free sour cream
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1/4 teaspoon salt
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1/4 teaspoon black pepper
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4 bacon slices, cooked and crumbled