INGREDIENTS
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1/2 cup walnuts, coarsely chopped, divided
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4 tablespoons olive oil, divided
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1 medium onion, finely chopped
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1 cup arborio rice
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Kosher salt and freshly ground black pepper
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1/2 cup dry white wine
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1 small garlic clove
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1 cup (packed) fresh parsley leaves
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3 tablespoons chopped fresh chives
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2 cups torn Tuscan kale leaves, divided
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2 tablespoons unsalted butter
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3 ounces Parmesan, finely grated (about 2 cups)