INGREDIENTS
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3 tablespoons olive oil
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1 onion, sliced
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1/4 pound cremini mushrooms, trimmed and quartered (about 14 mushrooms)
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1 1/2 pounds green beans, trimmed and slice into 1-inch pieces
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2 teaspoons salt
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1/2 teaspoon freshly ground black pepper
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1/4 cup white wine
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1/2 teaspoon red pepper flakes
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1 bunch kale (1/2 pound), rinsed, stemmed, and roughly chopped
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2 tablespoons lemon juice (about 1/2 a lemon)
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3 tablespoons finely grated Parmesan