"Veggies get in on the grilled cheese action with this gooey Kale and Caramelized Onion Grilled Cheese sandwich...."
INGREDIENTS
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4 medium kale leaves, stems removed
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2 teaspoons canola oil
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2 medium red onions, cut into 1/2-inch-thick slices
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1/4 teaspoon freshly ground black pepper
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1/8 teaspoon kosher salt
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1 teaspoon red wine vinegar
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8 (1-ounce) slices multigrain bread
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Cooking spray
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1 ounce finely grated Parmesan cheese, divided (about 1/4 cup)
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3.5 ounces shredded raclette cheese (about 7/8 cup)