We don't use any recipes for diabetics, rather I eat like anyone else but take only small quantities of fat and carb. I usually eat 85-100g of pumpernickel at breakfast & in the evening, and very small portions of pasta or rice if a meal involves them. E.g. breakfast is usually two slices of boiled ham & two of pumpernickel, which has a low GI for bread. Any bread I eat has to have whole seeds in. As far as meat goes it's usually poultry & often duck, but nowadays much of the fat (and therewith the taste) has been eliminated from pork as well. I do eat a lot of fish, too.
On the veg side there's an axiom that anything that grows underground is bad for diabetics. That's a bit extreme, but does tell you what to be wary of. I dislike most other veg, unfortunately.
Sweet stuff/desserts/fruit:
I avoid pears & bananas which have lots of free sugar, ditto grapes and, to a lesser extent, kakis and cherries. OTOH I can eat large quantities of strawberries. Not sure about rasp/blackberries, oranges are OK (orange juice is not, the fibre has been removed). Peaches/apricots OK within reason. Reason = two portions a day. IIRC the limit is the equivalent of 10g of glucose.
In general, fibre in fruit slows the absorption of sugar and even "conceals" some of it so that it passes out of the body. When fruit is cooked the fibre is broken down and the sugar released, so that cooked fruit is out. Slow freezing does much the same.
Strangely enough, I'm allowed two balls of ice cream for dessert (they didn't say what size so there's a lot of liberty there). Plain low-fat (4% or less) yoghurt. Yoghurt containing fruit but no added sugar: take a long spoon, because much of the juice has been freed of the fibre and the sugar is more quickly absorbed.
I avoid biscuits: even the sugar-free dietetic ones are full of starch.
If I'm going to be doing ~100k next day I have carte blanche to carb-load the night before. Unless it's a long event I usually don't, but I'll have around 85g dry weight of pasta for breakfast. One of the compensations of cycling, and especially Audax, is that after ~50 my metabolism works normally and I can eat like a human. 4-day events are pig heaven and who cares about deadlines. (Well, me, but...)
WRT recipe books: we do have a few, but I've rarely enjoyed anything out of them. They tend to be a bit precious.
Looking back over this I can see I've left a lot out, but the principles are: small portions of anything containing carbs in high percentages, and prefer foods with high fibre content.