Oh Melinda you poor thing. I am not sure any of what I say will be helpful because we are a long way off that age and it's fun and games! Anyway for what it's worth....
Maybe when he throws a tantrum, just ignore him and if he won't eat, he'll soon get hungry and realise it's not going to work (ie getting a reaction and he'll want food!) or alternatively feed him something he likes such as just peas for a week - he'll soon get pretty bored of that and want whatever you cook! Maybe totally stupid suggestions so feel free to ignore. Hope something works soon though - I know how stressful the eating issue is!