First, use a medium bowl to mix the lemon juice with 3 tbsp yogurt, 1 tsp tomato puree, dried red chilli flakes, half the spices, add 1 garlic clove, crushed and some seasoning.
You can toss the chicken into the marinate mixture, cover it and leave it for at least 1 hour in the fridge, best if you can leave them for up to 12 hours or overnight.
Preparing the chilli sauce. Use a food processor for this sauce. Put inside the whole red chilli or dried red chilli flakes, the rest of the spices, garlic clove, tomato purée, 1 tbsp olive oil, half the red onion and the pomegranate molasses, seasoning and pulse until you get a purée like texture. Set aside for later use.
Preheat oven to 200C/180C. Place the chicken pieces onto skewers. You can use metal skewers or if you use bamboo wooden skewers make sure you have been soaked them before.
Heat a grilled pan with a few drops of oil and place the chicken. When chicken skewers change color to golden brown turn it on the other side and then transfer it to a baking tray. Place the tray in the oven and bake the skewers for about 10 mins.
You can use the rest of the red onion, chillis, the remaining Greek yogurt, parsley and coriander to serve the chicken on flatbreads pure chilli sauce on top.