I will be honest here and say that I think you know what you need to eat but you are pretending ignorance on the subject in order to delay making a change.
You need to find a staple food that isn't crisps - that could be anything from tuna sandwiches to breakfast cereal but you need a daily source of carbs that isn't junk food, you know that, I know that, everyone knows that.
There is sometimes a giant gulf between
knowing something and doing something about it!
I suffered from agoraphobia and panic attacks for 3 years after dropping out of university at the age of 20. It was so bad that I hardly left the house sober in that whole time. I even had to send friends to buy me the booze!.
I
knew that should be out earning a living or studying, that I should get myself a girlfriend, learn to drive, go watch bands, travel and so on. What did I do in the hot hot hot summer of '76 while my peers were out sunbathing, womanising, having the summer of their lives? I stayed indoors, curtains closed, playing darts by myself for 10 hours a day, or watching soaps on TV.
Of course I
knew that I should be getting a life, but it took me over 3 years to actually do it!
I've seen anorexia close-up and watching someone push 4 peas about a plate for 5 minutes, trying to pluck up the courage to eat one of them is a complete head-f*ck, but I can tell you that screaming
"JUST EAT THE DAMN THINGS!" at the anorexic doesn't work.
I'm damn sure that he has had 20+ years of people saying
"Oh for God's sake, it's only a bloody apple - take a bite of it and if you don't like it, spit out!" That obviously didn't help him. Getting into cycling and talking about his problems obviously does.
If Gaz didn't have the problems that he has got, then of course I wouldn't be spending time telling him how to go about choosing/eating bananas or apples. He knows that he has to do this kind of thing, but he has a psychological/emotional problem with it. He's been very honest about it and some of us are trying to help.
PS I just went to take a bite out of a Cox's apple and thought there was something dodgy about it. It turned out to be completely rotten inside! That kind of thing is rare, but I'm sure that it would have freaked Gaz out if it had happened to him, hence my advice to be careful to checking apples before eating them.
I try to imagine how he would feel and anticipate any problems that might catch him out and trigger off his gag reflex, or whatever actually happens when he tries to eat something that worries him.