Ostomy diet basically, white bread and pasta, meats, maybe a little carrot or potatoes. that said you can't really live on such as basic diet. If you pouch is healthy you should be able to eat most things in moderation.
When you say makes you sick what do you mean? Do you physically vomit? Do you go bathroom a lot? Are frequent bathroom visits due to discomfort or volume? It's the discomfort internal and if so where (at ostomy site or middle pouch) or around your sphincter? Do you take fibre or other meds like loperomide? How much water do you drink? Do you eat or drink any acidic foods?
If all the foods you eat are bothering you then maybe you have pouchitis or cuffitis or maybe you just aren't taking on enough fluids.. seriously fluids makes a massive difference residually for people with incomplete emptying, and especially for people who take fibre.