Preheat oven to 450ºF (with convection, if you have it) and line two rimmed baking sheets with parchment paper. Toss cauliflower, kale and chickpeas with oil, 1 1/4 tsp of the salt, and spices, then arrange in a single layer between baking sheets. Roast for 10 minutes, then remove any kale that's crisped. Flip remaining veggies, rotate pans, and continue roasting 5-10 minutes more, until cauliflower is nice and golden, and chickpeas are crispy. (Check on any remaining kale frequently as it burns quickly.)