Steps:

Preheat Oven and Prepare Cauliflower: Preheat your oven to 400°F (200°C). Remove the leaves from the cauliflower and cut the stem so that the cauliflower can sit flat. Slice the cauliflower from top to base into 3/4-inch thick steaks. You should get about 2-3 steaks per head, depending on size.
Season: Place the cauliflower steaks on a baking sheet. Brush both sides of each steak with olive oil and season generously with za’atar, salt, and pepper.
Roast: Roast in the preheated oven for about 25 minutes, or until the cauliflower is tender and the edges are golden brown and crispy. Flip the steaks halfway through the cooking time to ensure even roasting.
Prepare Tahini Sauce: While the cauliflower is roasting, whisk together tahini, lemon juice, minced garlic, and a pinch of salt in a bowl. Add warm water a tablespoon at a time until you reach a pourable sauce consistency.
Serve: Place the roasted cauliflower steaks on a serving platter. Drizzle with the tahini sauce and serve immediately.

Za’atar Roasted Cauliflower Steaks