Vegetables

What is it with toddlers and vegetables?? The mighty midget (my 2 year old) used to eat anything that was put in front of him and he ate virtually adult sized meals for breakfast lunch and dinner, plus snacks. Then when he was 18 mths old he slowly but surely began cutting things out until he would only eat meat, pasta and biscuits, except for daycare days where he still eats anything they give him. Slowly at dinner he has started eating potato's again however even more worrying he is starting to eat very little at home at all. He still has a good breakfast of porridge and then fruit for morning tea but come lunch time he wont anything occasionally by 2pm I convince him to eat some yoghurt cheese and fruit but then again come dinner time he will eat a couple of small pieces of meat and potato, or a huge amount of pasta, or other nights nothing at all. He hasn't gained weight for at least the last 6 months. He still has plenty of wet and dirty nappies so I guess hes still healthy enough for the time being but I'm desperate to break him out of this habit.
Today I made cheesey vegie pasta bake for lunch, something he would have 2nd and 3rd helpings of at daycare. He is currently sitting at the table wailing and screaming I'm trying not to reward this behaviour by giving it attention. I keep having to go pick him up off the floor and sit him back at the table I'm desperately trying to keep my cool.
In half an hour I'll take the plate off the table but Toy Story will not be going back on the TV and there will be snacks before dinnertime. At dinner he will be given the meat that we cook and vegie pasta bake again, and we will follow the same routine i.e meal will stay for half an hour after everyone else is finished eating and if he doesn't eat again there will be no snacks or bottles to fill him up before bed.
I feel horrible and cruel but I cant let this refusal to eat go on long enough for him to start getting sick and losing weight, hopefully it only takes a day or two for him to get the message.
He is currently screaming at me at the top of his lungs, demanding his dummy, juice, his movie, to be cuddled...everything but the pasta and water in front of him, god this is hard. Wish me luck :(