Preheat oven to 450°.
Place cauliflower in a large roasting pan or jelly-roll pan. Drizzle with oil; toss well to coat. Bake at 450° for 20 minutes or until tender and browned, stirring every 5 minutes. Sprinkle with parsley, thyme, tarragon, and garlic. Bake 5 minutes. Combine cauliflower mixture, cheese, and remaining ingredients in a large bowl; toss well to combine.