Hi again Linda,
”Food diary” sounds more onerous than it is in practice.
I write the date, the meal, what I’ve eaten and then the three readings - on starting to eat, one hour, two hours.
For example.
Date, breakfast, 1 x wholemeal toast, ½ medium avocado, 2 x bacon - 3 readings.
Over time you’ll build up a bank of all the foods and ingredients (and importantly quantity) you can eat without a surge in BG.
I’ve established that I can safely, once or twice a week have either rice or pasta if I weigh out 60g. This is half what I’ve made over the years. But half a loaf is better than no bread.
I was quite naughty today. We had friends round last evening and bought way too much from M&S. So today I had quiche, crackers, magnum ice cream and more. Way more than I should. But for dinner I had a steak with salad and no carbs. BG measurements were in high 4’s & low 5’s.
Your enemy, unfortunately, is snacks in the house

Our friends brought the ice creams. Had they not been in the freezer I’d not have been weak today. But it’s not too difficult to get back on track.
I walk a lot and it’s good you do too.
Stay with it.
Henry