Marinate the chicken for 2 to 3 hours.
Cook in 275 degree F oven for 30 minutes. Let cool.

Cut into bite-sized pieces, soak in the marinade some more while you put the pieces on skewers. Grill until crispy on the outside.

Either purchase it (many specialty food shops have it - that's what I did)
or mix together:
1 onion finely chopped
1/2 c. chopped scallions
2 t. fresh thyme leaves
1 t. salt
2 t. sugar
1 t. ground Jamaican allspice
1/2 t. ground nutmeg
1/2 t. ground cinnamon
1 hot pepper, finely ground
1 t. ground black pepper
3 T. soy sauce
1 T. cooking oil
1 T. cider or white vinegar

Mix together and puree in blender. You can store any leftover marinade in the refrigerator in a tightly closed jar for about a month.