I have always, taken it very easy with some easy food (very low carb) a few bites, at a time, until later, then build up to a more substantial amount, or just a few bites until the overnight hours, then build up from there.
What you don't want is to spike higher than you usually do. With more carbs you can tolerate after fasting.
I had bacon and egg with a tomato after my fasting four days in hospital. In the cafeteria downstairs. But at home I start with a bit of salad first before protein later. As usual it all depends on your taste and if like me, lactose (dairy) intolerant.
Best wishes.