Shawarma Sauce

Everyone loves shawarma... The meaty saucy middle eastern wrap with fresh crisp veggies.. :) I am yet to come across someone who can say no to this wonderful sandwich.. :P and the garlicky sauce that goes with it is what makes this mouthwatering delight complete.. :D
I have picked the yoghurt based tahini sauce.. and flavoured it according to my tastes.. Each batch is different though..:)    
Here is a recipe without the yoghurt   http://toriavey.com/toris-kitchen/2010/01/tahini-sauce/                   

Ingredients

1/2 cup of thick yoghurt
3 tablespoons of tahini
2 tablespoons of lemon juice
a clove or two minced garlic/paste
1/4 teaspoon salt
*optional: chilly flakes/ pepper/chilly powder/ketchup
*Here I have used 1/2 teaspoon chilly powder and a tablespoon ketchup

Whisk all the ingredients in a bowl till thick and even.. :)
The lemon juice can be added according to taste.
Enjoy as a dip or spread on your shawarma/ sandwich instead of mayo.