Go for fibres and protein. I wouldn’t care about sugar in veggies so much. Never ever eat fine milled cereals, like in bread and donuts. For fibres i can recommend sweet corn, but you shouldn’t stamp it, because it should come out, as you eat it. This will blow up your intestinal and things in your intestinal villi will be released (this can be a high amount). If you make things right you will notice it on the toilet. It should all come out at once, shouldn’t be too liquid or hard and shouldn’t stink. It should smell light sour. Sorry for the last tip but in my opinion it is one of the best ways to analyze. Never ever sweets and convenience food. But if you go for fibres you can eat a lot. You have not to stay hungry all the time and the body won’t absorb it. Fine milled sugars get fast and fully absorbed, while the sugars in veggies or fruits not and with enough fibres all around even less. Full unmilled cereal is quite ok, because it has a small surface in opposite to fine milled cereal. Of course you can eat sweets from time to time, but you should go for a diet you can do all life long as kind of lifestyle. I can imagine, that one meal a day is kind of hard to follow through and when you stop it there might be that rebound effect. At least this functions for me and i blow up like a balloon just when i eat a brötchen(sorry don’t know the translation)(;