S.G.
It has been a power play with him now... you can tell because he is having a fit when you and his siblings eat it too, it isn't just his not liking it. I would back down as long as he eats his veggies but if he doesn't eat them either then you need something to give him the needed nutrition. If he eats blueberry muffins and pancakes, try banana bread but don't call it that, call it sweet bread. Once the struggle stops he may be more willing to try them on his own.. over at friends but not in front of you right away.