Well at the beginning, you won't eat anything solid at all. But then you can move on to low residue food -- no fiber, seeds, raw fruit/veggie (except bananas), skins.... things like bread, white pasta, fish, chicken, yogurt, potatoes w/out skins.
You'll want to eat lots and lots of protein -- that helps with wound healing. You might want to get some kind of protein shakes to supplement, as it's hard to get enough. My surgeon said that at the beginning, 2/3 of my calories were going toward wound healing.
From reading the list, people seem to be very different in terms of appetite -- I was hungry a lot, others had trouble with having enough appetite to eat enough.
For me the progression toward normal foods has been gradual -- and now I'm not quite remembering the time frame, but after a few weeks I started eating things like cooked carrots and then moved on to other cooked veggies. Maybe two months out I tried whole grain things. I am still very careful about nuts, popcorn, and stringy veggies (celery, bamboo shoots, bean sprouts) and most raw veggies.... so I haven't tried a lot yet.
But I'm eating way more than I could when I was sick .....
I'm sure others will be along to fill in more details.
Good luck w/the surgery!
48 years old, female.
2004 dx indeterminate colitis. Back and forth between Crohn's and UC dx. Many drugs, minimal success.
2010-11 Crazy skin and eye complications, high fevers, bad flaring. Out of good drug options, tired of scary drugs.
Feb 2011 -- proctocolectomy with permanent ileolostomy; abscess, blood clot. Still healing, still glad for the surgery