You could always use myfitnesspal (app and website available). Using that you can record your food and drink, and it'll calculate the carbs etc. You can also add recipes, either by adding each ingredient or by url, then again, the website does the calculations.
Once you have recorded something once, it's just a few clicks to add your days' food. I still keep my food diary, every day, since diagnosis. It takes moments.
With those sorts of records, you can always check back how things went last time you ate any given thing, if you have an odd reading for no apparent reason.
This combined with my blood scores really were great tools and data in my early days. I'm sure it seems a faff, but it really is worth the initial effort. 🙂