It sounds like you are wondering if any food you eat can cause you to flare. I could be wrong, but I don't think a flare is caused by what we eat. I believe foods are mainly a concern for potential blockages, gas, output consistency, etc.
I have Crohn's Colitis, which means my Crohn's was confined to my colon, & rectum. My small intestine and ileum were never involved with disease.
My proctocolectomy with permanent ileostomy was in July 2011, coming up on 3 years. I have had no further involvement once my colon, rectum and anus were removed.
I found this statistic on my own, but my surgeon and GI as well as some others on this board with Crohn's Colitis have confirmed it. If Crohn's was never present in the small intestine, the removal of the colon, rectum and anus will give around an 80% chance of a non-recurrence. I cling to that 80%, but am ever mindful that Crohn's is not curable and it can return. If yours was only in your colon, this might ease your mind a bit. If it was also in your small intestine, I would imagine your doctors would be suggesting some kind of maintenence drug.
My GI told me to be very "judicial" with the use of NSAIDs, like Aspriin, Ibuprofen, Naproxin Sodium, etc. She said 10% of Crohn's patients have recurrences due to the use of NSAIDs.
Good luck and this is the place to be for any questions/concerns you have