How to Make It
Preheat the oven to 350°. Spread the slivered almonds in a pie plate. Toast the almonds in the oven for about 4 minutes, or until lightly browned.
In a medium saucepan, toast the yellow and brown mustard seeds with the cumin seeds over high heat, shaking the pan frequently, until fragrant, about 20 seconds. Add the sugar, water and white vinegar and cook, stirring often, until the sugar is dissolved, about 2 minutes. Stir in the raisins and cranberries, cover and remove from the heat. Let the dressing stand for 2 hours.
Light a grill. In a large pot, bring the Capon Poaching Liquid to a simmer over moderate heat. Add the cauliflower florets, reduce the heat to moderately low and simmer until just tender, about 10 minutes. Using a slotted spoon, transfer the cauliflower florets to a large baking sheet and let cool slightly. Toss the florets with olive oil and season with salt.
Grill the cauliflower over moderately high heat, stem ends up, for 4 to 5 minutes, or until well browned. Turn and grill the cauliflower for 2 minutes longer, or until tender; transfer the cauliflower to a platter. Stir the toasted almonds, chives, parsley and the 1/4 cup of olive oil into the raisin dressing and season with salt. Spoon the raisin dressing over the grilled cauliflower florets and serve.