Another hint for veggies in foil on the grill is to cook them partially in the microwave oven. I do this with potatoes and onions. Get them at least very hot, maybe even partially cooked, then wrap in foil with olive oil, butter, or margarine, salt & pepper, then toss over the coals with your meat, and they will be ready when the meat is. Yummm yummm. You get the charcoal flavor but cut down on the time.