@JoKalsbeek my weight is so, so I’m not considered obese but on the overweight bit of the nhs graph (god knows how now). To be fair I put on weight due to chemo & steroids but lost 2 stone on the chemo that I am on now. Yes that’s the sort of stuff I eat generally, tuna, salmon, mackerel, veg, salad, boiled or poached eggs (don’t like egg white really) don’t like bread but am partial to a potato and boiled rice not big portions. Definitely don’t like meet. Will try the dark chocolate I can’t stand ordinary milk chocolate so will see how that goes. Will have a mackerel salad tonight! Is there a graph anywhere that sets out the carbs in things like potatoes based on their weight? So sorry to be a pain with all the questions, beginning to feel complex.
You, alas, want to avoid potatoes, rice, any kind of bread-ish thing, pasta, cereal, corn etc... White, brown, wholemeal, none of it matters. They're carbs, and they
will spike you. That's why I mentioned upping other components of your main meals. The fish are excellent options, and you might be surprised just how versatile cauliflower rice is. (I use it almost daily, with ever changing herbs and spices, and usually throw in grated cheese). I only asked about your weight because if you're skinny or bordering on underweight, I can't tell you that intermittent fasting (skipping one or two meals a day for instance) is a good idea, because it wouldn't be. If there's mass to spare though, it should be perfectly fine to do. Not trying to fat shame you or anything, as I was 102+ kilo's once upon a time myself. (I was a lot more + than that, but after 102 I stopped weighing myself. I'm a coward.

). Steroids and chemo can certainly have an impact on weight, so no surprise there. Are you still on steroids? They up blood sugars, so if you have a problem getting into the normal range, that can certainly be a culprit. Depending on how much is administered, you might see a rather large spike that lasts a few days. (That's assuming a shot. If it's daily tablets, there's less of a huge spike, but a marked permanent elevation.). So if you're on those at any point, don't panic if your numbers go up (again). We make corticosteroids ourselves when we need extra energy, and the liver obliges by dumping glucose. It can't tell the difference between the stuff we make naturally and what is administered though, so if it gets the signal from steroids to start producing glucose, it will... And it won't stop as long as you're on the steroids. Can't be helped though, if you need them, you need them. (I use them every now and again too).
Chocolate is an OPTION, it's not mandatory.

If you don't like it, try something else for a treat. Luxury cheeses? I rather like whipped (unsweetend) cream on my nespresso, or on some strawberries. (I can't actually
have cream due to cow milk issues, but every now and again.... I'll treat myself and just pay the price willingly!

). Seek out treats. Oh heck,
www.dietdoctor.com might have some ideals, meal-wise.
What else do you normally eat? Maybe there's workable alternatives or things you thought you couldn't have with diabetes, but really can?