How to Make It
Heat oven to 350° F. Spread the pine nuts on a rimmed baking sheet and toast, tossing once, until golden, 4 to 6 minutes; transfer to a plate.
Increase heat to 450° F. On a separate rimmed baking sheet, toss the cauliflower with the cayenne, 2 tablespoons of the oil, ½ teaspoon salt, and ¼ teaspoon black pepper. Roast, tossing once, until golden and tender, 20 to 25 minutes.
Meanwhile, whisk together the tahini, lemon juice, the remaining 2 tablespoons of oil, ¾ cup water, and ¼ teaspoon each salt and black pepper in a large bowl (adding more water if necessary, to achieve the consistency of heavy cream).
Add the kale, onion, raisins, pine nuts, and cauliflower and toss to combine.