hi kat83! my eldest son would only eat yorkshire pudddings, mash and pizza. never fruit, veg, i tried SO hard to introduce other foods but he simply would not eat anything else. This went on for 2 years. In the last few months he has done an about turn and will try ANYTHING. its amazing.
I now have a second child who will only eat super noodles and pizza, and i simply know i will get there in the end.
The secret is to simply stop making it an issue, give her what she wants under no pressure and if you don't worry about it she will come round on her own. If children are hungry they will eat, my children eat adult portions compared to their friends but you'd never know to look at them.
As for the table thing, we always sit together and eat as a family twice a day at the big table. its important to do the one thing so she learns its all a valuable lesson.
Good luck and, please my advise is simply for you to stop worrying, in time it will happen. Just don'nt make it an issue.