Taz - I have a lot of banned veggies and fruit on my low FODmap diet (it's annoyingly restrictive, but it avoids a lot of pain from IBS). They include onions, any pulses or beans and lentils, peas, broccoli, cabbage, brussels sprouts, mange tout....annoying! Apparently they've been proven to irritate the bowel.
I ignored the advice to avoid garlic and am fine with it.
Fruit wise, apples are apparently the biggest baddie (it's the fructose). I'm not allowed mangoes any longer. I might try to reintroduce them. I'm getting bored with the restrictions on fruit.
I miss lentils and chickpeas, but they did definitely upset me - 6 months pregnant-look and severe pain.