INGREDIENTS
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2 large sweet onions, quartered
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2 tablespoons extra virgin olive oil
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2 tablespoons unsalted butter
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1 yellow onion, thinly sliced
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1 tablespoon light brown sugar
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3 garlic cloves, minced
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1 cup nonfat Greek yogurt
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1/2 cup sour cream
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1 1/2 tablespoons fresh lemon juice
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1/2 teaspoon cumin
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salt and pepper to taste