After diagnosis, I was told to lose weight and designed my own diet. I found that I needed a "filler" - something with bulk but minimum calories. I discovered braised cabbage and learned to like it with a dash of chopped bacon.
As time went on I started testing (see Test, Review, Adjust) and found that most of my list became a problem: potatoes, corn, carrots (when cooked) and baked beans became dangerous foods for me and I had to find others.
It is amazing what you can learn to like when you finally realise that your life may depend on it.
What focussed my mind wasn't the possible loss of life - but the possible loss of my sight. Negative motivation - maybe; but it sure worked for me. And the more I read, the more I learned that there were side benefits to many of those veges - particularly for the eyes
I just looked in my pantry and at the "crisper" of fresh veges and fruit in my fridge. If you had told me four years ago that I would be buying the following at my grocer's I'd have said you had rocks in your head. But I do - and as I bought each for the first time I researched recipes on ways to make them palatable; gradually I then found that I liked them no matter which way I cooked or prepared them; it was all in my mind. I am not recommending this as a list for anyone - it just happens to be what I have at this moment:
Capsicum(bell pepper), red, green ,yellow
Silverbeet (Swiss Chard)
And some fruits, used with care:
In my garden there are veges in season, hot chili peppers and herbs - thyme, basil, rosemary, oregano, sage, lavender and mint. In "drygoods" I have lentils, brown rice, barley, psyllium, guar gum, flax seed, kidney beans, cornflour etc. And a large range of spices. I've probably missed some - but I think you get the picture. You do what you wish; I added each thing individually over time, and had to experiment a bit.
But, to repeat myself, it's amazing what you can learn to like once you accept that your life depends on it.