""The stems can be tough on kale, so remove as much of the stem as possible."..."
INGREDIENTS
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1 tablespoon olive oil
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1 white onion, sliced
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2 Red Delicious apples, cored and cut into bite-size pieces
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2 teaspoons apple cider vinegar
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1/8 teaspoon sea salt
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1/8 teaspoon ground black pepper
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4 cups chopped kale leaves