Blend onion in a blender or with a stick blender. Strain the liquid to get around ½ cup of onion water.
Add yoghurt, tomatoe paste, Salt, paprika, cumin powder, pepper and butter and mix well.
Cut chicken into thin fillets by cutting vertically and marinate it in the marinade prepared. Allow it to be marinated for 3-4 hrs or preferably overnight.
Put chicken on a cling wrap by overlapping and then roll it into a log shape. Wrap it in foil and put in the freezer for 24 hrs. It should be frozen and hard.
Take chicken out and Cut thin slices but don't let meat to get completely defrosted. The first few slices are hard to cut but as you keep cutting it gets easier.
Heat oil/butter in a pan and grill chicken while turning it around.
Garlic Sauce
Mix all Ingredients together.
Salad
Mix all the ingredients except lettuce. Add lemon juice and sumac and mix.
To Assemble
Heat bread slightly, in the same pan chicken was prepared.
Put chicken on the bread, add lettuce and salad. Drizzle yoghurt sauce and chilli sauce ( or any sauce you like). And wrap it.
Turkish Rice Pilaf
Wash and rinse rice with water. Soak them for 15-20 mins.
In a pot heat oil and butter, once hot fry vermicelli for few minutes until it slightly changes colour.
Add rice and fry them for at least 5 minutes
Add Water, when the water starts to simmer add butter and salt. Reduce heat to low. Cover and cook for at least 15-20 minutes until the rice are done.,
Notes
You can use either breast or thigh fillets or mix both together.
This is quantity of water required for basmati rice. If using any other type of rice use water according to instructions given.