I recommend reading Dr. Filonov book. He has a good plan on how to break prolonged fast. Simple rule - recovery time is 2x time of the fast. So expect to spend 20 days eating super clean to get the best healing results. Start slow, listen to your body, chew your food really well, do not eat more than 200ml of food in one setting (by volume), do not use any salt in the first 3 days, you can start adding salt very carefully from day 4. And go read the book it has lots of good advice.
Whatever you do, the principle is just take very little amounts very slowly irregularly of things you PLAN to eat in future.
So if you plan your future diet to be potato and yoghurt, or oats then eat very little amount of that at a time - one mouthful. Leave long gaps between mouthfuls - e.g. 10 mins plus - long enough to keep your body guessing when the next mouthful will come and has to make a decision which part of the body is going to get the new food and also let your body fire up very slowly. Also 1. learn to listen to your hunger and desire more - you don’t want this to get out of whack again.
Throughout the fast think about how easy it is, before the fast in days leading up think how easy it will be and imagine yourself able to handle it very well, and not eat a thing without even thinking of food, as you approach food, reign in your wild desire to eat side, and don’t indulge that if you feel it happening
Your gut (bacteria) is going to set to whatevr you fill it with after such a long break. So the worst you can do is junk food.
Once you are recovered from the immediate fast and can eat normally, eat something very nutritious. Organs e.g. liver are particularly good. Bone broth (put bones in water in a slow cooker for a few hours to make it) is good.
What you don’t want to do is either A) cause a binge - e.g. go on choc armageddon and soda celebration party. Never do thatB) Go ploughing into eating a lot. The whole point is to recalibrate your eating style to something involving much smaller portions and probably different food to what you noramlly eat. You need to change your eating lifestyle to make permanent losses.