Preheat the oven to 450 degrees F. Arrange the cauliflower on a large, rimmed baking sheet in a single layer.
Heat 1 tablespoon of the oil in a small skillet over medium heat. Add the pine nuts and cook, stirring, until golden brown, about 2 minutes. Add the raisins and stir until plump, about 30 seconds. Transfer the nut mixture to a large bowl.
Add the saffron to the skillet with the vinegar and 2 tablespoons of water. Increase the heat to medium-high and simmer until the liquid reduces down to about a tablespoon. Add the remaining 3 tablespoons of oil. Add 3/4 teaspoon salt and a few grinds of black pepper. Cook for 30 seconds. Drizzle the oil mixture all over the cauliflower and toss to coat. Roast until just tender and browned in spots, about 15 minutes.
Stir the parsley and dill into the bowl with the nuts and raisins. Add the cauliflower, season with salt and pepper and toss together. Serve warm or at room temperature.