Heat the oil over medium-high heat in a large skillet with a lid or a Dutch oven. Add the kale (add it in batches if necessary) and cook until it starts to wilt, about 2 minutes. Add the cauliflower, raisins, and curry powder. Toss well to coat the vegetables with the curry powder. Add the water. Cover the pan, reduce heat to low, and cook for 15-20 minutes or until the cauliflower and kale are soft.
Remove the lid and if all the water has not evaporated, raise the heat to high and cook to evaporate it, stirring constantly for a minute or two. Season to taste with salt and pepper.