Place beans in an ovenproof Dutch oven; add enough water to cover by 2 in. Bring to a boil; boil for 2 minutes. Remove from the heat; cover and let stand for 1 to 4 hours or until beans are softened., Chop one onion; slice second onion and separate into rings. Set onions aside. Drain and rinse beans, discarding liquid. Return beans to the pan. Add reserved onions; stir in the remaining ingredients. Cover pan and place on the grill rack over indirect medium heat., Cover grill; cook for 1 hour or until beans are almost tender. Uncover Dutch oven; cover grill and cook 30 minutes longer or until beans are tender. Discard ham hocks.