In a medium bowl, combine yogurt, tahini (if using), lemon juice, and garlic. Stir until smooth and dreamy.
Add cumin, coriander, paprika, salt, and pepper. Mix well. The aroma should make you seriously consider licking the spoon.
Thin to your preferred consistency with a splash of water or a drizzle of olive oil. You want it pourable but thick enough to cling to shawarma wraps.
Taste and adjust—more lemon for brightness, more salt for punch, or a pinch more paprika if you’re feeling dramatic.
Chill for at least 15 minutes to let flavors mingle. If you’re in a rush, a quick fridge-cool works too.