I find keeping the food simple, with enough ‘healthy’ fat , and to just eat twice a day on the fasting days.
Simple brunch around 10:30 of Greek yogurt, with a few walnuts and blueberries, with a cup of black coffee. Or scrambled egg, with low carb bread toasted.
Early evening, some fish, (I like salmon, haddock, sea bass) baked in foil with a pinch of black pepper and lemon, and smear of butter. Or home made veg soup with grated cheese. Finish eating by 6:30pm. So the ‘eating window’ is short. Drink plenty of water and peppermint tea, and make sure the 2 fasting days are not consecutive days. On the other days make sure a range of nutrients, to include more veg and dairy, and nuts in addition to the protein, but try to keep to short eating window.
I could probably do with following this advice for myself, again. It is a while since I was that disciplined, and it did make me feel a lot healthier, with better blood glucose and weight management.