Pour the yogurt into a tall container. Carefully add enough tahini so that the mixture doesn`t taste too bitter, but you can taste the tahini. Always add, stir and taste.
Add the chilli powder, cumin and parsley and season with salt and lemon.
If the sauce is too thick, add a little water and season again. The sauce should be spreadable, but not too thin.
The sauce can also be used as a dip for finger food, roasted meat or kebab, or as a savory dessert.