When I've be in similar situations I've gone with stew. Heavy on the veggies with bread on the side, so the carb addicts can have some, but it's not part of the meal so you don't have to eat it. Then send the leftover bread home with someone! I've found most folks don't eat enough veggies and really love a hearty stew. I use ground beef (ok, usually venison but I didn't say that cause it would've bugged some folks), little bit of taters, yams, carrots, cabbage, onion, garlic, tomatos, little bit of corn, whatever else veggies I have that need to be used up.