Cauliflower roasted in the June Oven is paired with garlicky tahini sauce in this vegetarian dish that’s great on its own or as a side to June’s Rosemary Lamb Chops with Tzatziki or Roasted Chicken Breast. Sumac is a tangy spice made from dried berries that adds tartness and color, but you can squeeze lemon juice or sprinkle ground coriander over the cauliflower as a substitute.