In a blender combine green onions, garlic, jalapeno, lime juice, olive oil, brown sugar, allspice, thyme, cinnamon, salt, pepper and water. Mix until smooth. Scoup out 1/4 cup and set aside for grilling.
Place chicken in a plastic zip up bag. Pour in marinade squishing bag to ensure chicken coated. Close bag and refrigerate for 30 minutes or longer if you can.
Remove chicken from marinade and place on a heated and oiled grill. Close cover and grill at medium-high heat turning occasionally until chicken is dark brown or blackened if you prefer, about 10 minutes.
Move chicken to cooler part of grukk and brush with reserved marinade. Cover again and continue to cook chicken another 15 minutes or until juices run clear.
Remove chicken from grill to platter and let rest covered in foil for 10 minutes.
Serve with your favourite rice or salad.