In a bowl whisk together the lemon juice, oil, yogurt, garlic, tomato paste, oregano, all spice, cinnamon, cardamom, oregano, pepper and salt.
Then add the chicken and toss it through the mixture to make sure that all pieces are well coated.
Then transfer to a large plastic bag (resealable kind is best) and place in the refrigerator for 4 hours.
Whilst you are threading the chicken, onions and bell pepper on to skewers start up the barbecue so it has reached the required temperature to cook these chicken kebabs.
It is important that you cook the chicken over a medium to high heat for 5 minutes on each side.
The exterior of the meat should be golden in color, whilst when you make an insertion in to the meat it should look white inside.
Once they have been cooked through properly remove kebabs from heat then sprinkle over some of the flat leaf parsley before serving.