Method:
Cut the chicken, onion, pepers and tomatoes into cubes nearly same size ( about 2X2X2 cm ) and put them all in a deep bowl, add the rest of ingredients ( sauce, salt, pepper, garlic powder and oil) and mix well.
Cover and let it set for at least 2 hours so chicken get tender by the effect of the vinegar in the sauce.
Make your garlic yogurt by mixing all ingredients together in a small bowl and set a side.
After 2 hours, get your grill sticks filled with chicken, tomato, pepper and onion cubes in a nice way , don’t over fill them coz each stick will make a sandwich, grill them on a hot grill for 3 minutes on each side .
Make the sandwiches by using one flat Arabic bread for each grill stick, add some garlic yogurt and more Peri Peri sauce then some salad leaves or even rocket leaves will work perfectly here.