Chicken kabab with Tahini Sauce Recipe

INGREDIENTS

For chicken:
1 kg chicken
1 onion
3 cloves garlic
1/2 cup parsley
1 tsp salt
1/2 tsp black pepper
1/2 tsp paprika
1/2 tsp cumin

For tahini sauce:
1/3 cup tahini
1/4 cup water (add more if needed)
1 tbsp vinegar
1 clove garlic
1/4 tsp salt
1/4 tsp black pepper
1/4 tsp cumin