Roasted Cauliflower with Tahini Sauce

Ingredients (11)

• + 2 tablespoons olive oil, divided add to pantry
• + 1 head cauliflower, broken into florets add to pantry
• + 2 teaspoons za'atar add to pantry
• + 1 teaspoon salt add to pantry
• ✓ 2 tablespoons plain yogurt
• + 1 tablespoon tahini add to pantry
• + 1 tablespoon lemon juice, or more to taste add to pantry
• + 1 tablespoon warm water, or as needed add to pantry
• + salt to taste add to pantry
• + 1 tablespoon sesame seeds add to pantry
• + ½ teaspoon sumac powder add to pantry