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Preheat the oven to 400 degrees F.
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Cut potatoes into cubes. Soak the potatoes in a large bowl of ice water for at least ten minutes while the oven warms up. After ten minutes, pat potatoes dry on a dish towel.
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Place cubed potatoes on a medium baking sheet. Toss potatoes together with olive oil and salt and pepper. Bake in the oven for 35 minutes, tossing a few times in between.
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While the potatoes roast, add cheese, pine nuts, salt, pepper, and garlic to a food processor. Pulse for a few minutes until the garlic and nuts are a small mince. Add in the kale, parsley, lemon juice, and olive oil. Pulse until smooth, 1-2 minutes.
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When potatoes are roasted, add to a large bowl along with three tablespoons of pesto. Toss together to evenly coat. Serve right away.