Stepkids - Two Weeks

They will be here in two weeks...well two weeks and two days. The new thing now is that my stepdaughter has decided she is a vegetarian. She had decided this a couple years ago but it didn't last. I guess she has decided again.

I have to get busy coming up with ideas on what to feed her that:

1. Provides her with all the nutrients she needs; and
2. Doesn't break our very tight budget.

Does anybody have any good ideas? I have a few but not enough to feed a kid any amount of variety for a week. Help!?!?