For any normal meal we would generally decide on a meat component and build on that. Perhaps we would enjoy a beef dish or a chicken dish or a fish dish. Once the idea of barbecuing is mentioned however all concept of dietary reasonableness goes out the window: "Steak is good on a barbecue so lets have some of that and some chicken and some sausages and some barbecued salmon while we are at it. Don't forget the chicken wings and we need peppers and mushrooms and onions and potatoes and plenty of crusty white bread while we are at it."
Choosing to serve a green salad on the side does not compensate.