Preheat oven to 450 degrees. Place chicken on a rimmed baking sheet, skin-sides up. Drizzle with oil; season with salt and pepper. Roast until a thermometer inserted in thickest parts registers 160 degrees, 30 to 35 minutes. Let cool 10 minutes, then remove bones and thinly slice.
Combine cauliflower, lemon zest, and 3 tablespoons lemon juice. Season with 1 1/2 teaspoons salt. Let stand 20 minutes. Stir in shallot, 3 tablespoons oil, and chopped herbs. Toss kale, carrots, and chickpeas with remaining 1 tablespoon lemon juice and 1 tablespoon oil; season with salt and pepper. Divide cauliflower mixture among plates; serve with salad, chicken, and herb leaves.
Preheat oven to 450 degrees. Place chicken on a rimmed baking sheet, skin-sides up. Drizzle with oil; season with salt and pepper. Roast until a thermometer inserted in thickest parts registers 160 degrees, 30 to 35 minutes. Let cool 10 minutes, then remove bones and thinly slice.
Combine cauliflower, lemon zest, and 3 tablespoons lemon juice. Season with 1 1/2 teaspoons salt. Let stand 20 minutes. Stir in shallot, 3 tablespoons oil, and chopped herbs. Toss kale, carrots, and chickpeas with remaining 1 tablespoon lemon juice and 1 tablespoon oil; season with salt and pepper. Divide cauliflower mixture among plates; serve with salad, chicken, and herb leaves.