What I quickly identified as a big problem while trying to recover from Colon inflammation was isolable fiber.

After a couple of months into recovery, the only vegetables that I found I could eat were Zucchini squash and Yellow Crookneck squash because they both broke down very well when cooked.
I couldn't eat green beans (my fav) for many months and even now 12 months later, I only will eat them if they are very young and tender...
It took me 10 months to even try a salad again.