How do I start IF after prolonged fast and as plant eater?

Hi there

I have a question. So I have been fasting for a prolonged period. It was my second fast (the first was a while back, for 21days) and now again for 10days. The break has been 5days ago and I want to continue with Intermittent Fasting as I did before. I will usually fast on 2days a week (Monday and Thursday) not eating anything. The thing is, that I eat mostly plant-based and I also eat once a day only in the late afternoon/evening for health and environmental reasons. This way of eating helps me a lot with focusing and fighting attention deficit and concentration problems. I feel lighter, quicker and more productive. I do eat meat, dairy and eggs if I know and can trust the source, or when I am invited or trying a new speciality I don’t know yet as I am passionate about good food (I am travelling since over 1.5years….). I am not strict, but the last time I ate something coming from an animal is 2months ago.

What I want to say by that is, that unlike a lot of people writing here, my diet is very high in carbs (vegetables and fruit, unrefined and unprocessed whole foods). My plates are usually high in volume, I eat very slowly, consciously and sometimes spend 1-2hours eating and chewing :)

I didn’t know Jason Fung before and got kinda curious how he usually breaks a prolonged fast?

Is it better to get back to eating the full load of required calories quite quickly and fast intermittently as soon as possible or do I first have to go through a low calorie period?

I am confused, as usually long fasts are broken by slowly incorporating different and more calorie dense foods, but he wrote something about boosting the metabolism, by giving ones body the calories it needs.

I will have to get his book as soon as I settled down, but until then I hope that you guys might help me.