You are certainly not alone Angelico! I was diagnosed with this about five weeks ago and after a few blips at first, I've managed to get it under control and although I was prescribed insulin in case I need it, I haven't yet used it.
Breakfast is toughest for me as I was a cereal eater before and now even one shredded wheat gives me a reading well over 9! So I generally have quite a high protein breakfast - cheese omelette with mushrooms, tomatoes and spinach is a good one for my readings. I have also been able to get away with a slice of soya and linseed bread with mackerel or with a hefty scraping of peanut butter if I'm in a real rush. A small portion of porridge sometimes works, sends reading up to the limit though, but the problem is it's so small it doesn't fill me!
Lunch, I generally have a huge salad with a chicken breast or piece of fish, maybe some avocado too, and a slice of rye bread. It's a PITA as I have to cook the chicken and fish the night before, but worth it as I feel full all afternoon. I find I can also get away with some full fat Greek yoghurt and tonnes of linseeds (for their laxative properties now I can't have lactulose or prune juice!!!) either immediately post lunch (if I'm not too full already) or as an afternoon snack.
Other snacks I find good are nuts, cottage cheese, no more than 2 oatcakes with philadelphia, banana, apple or just plain old cheese.
Dinner, pretty much anything with a small portion of wholegrain rice works well for me (although wholegrain rice is so expensive - £4.99 for a kilo in my local Tesco!). Couscous has also been a 'good' carb and wholewheat spaghetti, but in all cases a much smaller portion than that recommended on the packet. I combine one of these with perhaps a tomato-based curry, chilli, spag bol, stir fry, or piece of meat and I stick some veg alongside everything whether it goes or not (eg some mange tout or green beans with a curry). Gets quite repetitive, but I've only got another 4 weeks to get through!! I find mash is not good as you generally end up eating more than you should because it's been mashed up, but also as the carbs have already been broken down massively by boiling and then mashing, it doesn't take long for them to release their energy, hence the high readings they produce. Slow release carbs are the key, so the less cooking and boiling you do of them the better. My dietician also said not to eat anything made of white flour, but I know some don't recommend being that strict.
One thing I have done is cut sugar out completely, so not even any bites of DH's sweet treats, and aside from the benefits for the baby, this has made me feel really bright and awake! I do miss it, but figure that the one bite I might be able to manage really isn't going to satisfy my craving. Sometimes berries and cream fills the hole when I need it! Oh, and fruit juice had to go for me - orange juice almost sent me into a coma!!
Wow, that was an essay (you can tell I'm on wind down as it's my last week at work!). Hope it's useful.