[crispyambulance]

> The idea here is to abstain from food for a full year and then restart eating normally with a light balanced diet with a nutritionist's help.

Why not just start with that instead of "abstain[ing] from food for a full year"? That's what a nutritionist is FOR!

If you got strong will power, but weak moderation it means you just need structure.

But if you have to do it yourself, why not count calories?

It's simple and works for many folks. Select nutritious foods that you like and that comports with your culture, weigh yourself everyday and count calories (using one of many apps that even break it down to your component nutrients). Limit calories to a level that lowers your weight 1-2 lbs a week. Adjust as needed... but keep doing it even after you've leveled off to your target weight, do it until it's a habit, and start again if your clothes get tight.