My daily diet is 3 sandwitches (1for breakfast, 1 for lunch and 1 about an hour before bed) and 1 cooked meal with a couple of potatos or a couple of spoonfulls of rice and loads of salad. I just make sure that I don't over do it with the carbs, two years of testing has shown me how much my body can tolerate.
As for treats, about 3 times a week I eat a bar of sneakers, sometimes 2 or 3 Reach Tea biscuits or a small portion of ice cream (one with the lowest sugar content). Last night, about 2 hours after supper I had 2 pieces of sponge cake, I didnt weigh them but together they probably weight less then 70/80 gramms. My BG at 11pm was 6.1.
I've never had great cravings for sweet things but do like someting sweet and will eat it if there's something in the house but only one small portion once a day, no more. Otherwise, if I do get a craving a cup of de-caf tea with 2 sweetners helps to keep me out of the fridge.