My 2 year old staff diagnosed with a crazy amount of food allergies.

My poor baby girl developed sickness and the runs 5 weeks ago after a 3 night stay at the vets where she suffered bleeding in her gut and numerous different medications the vet did an allergy test.
The results are in…. she can’t eat beef, chicken, lamb, Turkey, rice, wheat, oats, peas, fish, soya or corn!!! This leaves me wondering what the hell can the poor girl eat. I can’t afford the really expensive foods and am really struggling to find something for her.
She is obviously in pain and I want to solve her problem as fast as possible. Any suggestions?