Hi, your bio doesn't say whether you have a colostomy or an ileostomy and how long ago your surgery was. I had a colostomy for about a year and could eat anything. I got an ileostomy just over two months ago and although I was warned about not eating lots of things, so far I have found I can eat anything. I was very careful for the first six weeks at least to let the healing do its thing and the swelling to go down but I've been experimenting with lots of things in the last couple of weeks. I ate avocados right from the start with no problem. I've been eating tomatoes, onions, olives, mushrooms, blueberries, and strawberries, all things I was told were risky. I haven't tried pineapple yet or mangoes. I also have to plead guilty to not always remembering to chew like crazy, but then I always have been a slow eater and probably chew enough naturally anyway.
I was told that a lot depends on what the reason was for your surgery. Mine was chronic constipation resulting in a bowel perforation. I have no scar tissue or lesions, which seems to be what gives many ostomates trouble passing food. This is more likely if you had ulcerative colitis or Crohn's disease.
Bottom line, don't consider anything forbidden. Try a small amount and see if it's OK, and only try one "risky" food at a time so that if you do have problems, you will know what caused it.
Good luck!
Terry