Mix all spice rub ingredients into a paste.
Liberally apply spice rub over the chickens.
Slice one large onion to lay the chicken on in the roasting pan. Add 2 cups of water and roast at 425F for 40 min.
Remove, baste, and put back into the oven for 8-10 min.
Remove from oven and let rest 20 minutes before portioning.