INGREDIENTS
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2 pounds unpeeled Jewel or Garnet yams, cut into wedges 1-inch long by 1/2-inch wide
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1/4 cup cooking oil, divided
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Salt and black pepper, to taste
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1/4 cup whole garlic cloves, peeled
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1 yellow onion, sliced
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1 bunch green kale, tough stems removed and leaves cut into 1/2-inch strips
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2 tablespoons red wine vinegar
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1/2 teaspoon dried thyme