She will eat some fruits and the occasional cheese sandwich, but when it comes to tea time she wont eat any meat (except on taco night) and just picks at her veggies and constantly harrasses us for an hour until we crack and give in and send her to bed. (Iknow that's not the right thing to do, but I am at my wits end!!!)
It sounds to me like this is a power struggle to her - now I know that is as cheesy as a Dr Phil episode, but that's what it sounds like. She might be starving hungry, but she has 'won' the battle by making you send her to her room kwim? Have you tried setting up a eating plan - where you sit down together and work out what she can eat for the week, like put down where all her snacks will go and if she eats her main meal without complaint, then she can choose a snack of her choice for later in the week? If you show that you are giving her some 'control' over what see eats, she may be a bit more co operative with you. It could also make her feel like she is growing up and being treated with respect if she is allowed to help plan the weekly meals.

Good luck