As for your fast, I'm not sure how I can help as I have really very little knowledge or experience in this area. I also am not sure how you should break your fast. I guess how I'm eating could be categorized as intermittent fasting, but this is something that I feel has occurred naturally. As I added more fat to my diet, I felt less hungry. I really noticed this after I began doing a version of bullet proof coffee, adding extra virgin coconut oil, butter, mct oil, etc to your coffee, which filled me up. It taught me how to recognize that I was satisfied and could wait before I ate my next meal.
As far as what to eat, eat what you enjoy but keep track of everything your eating by measuring. I love bacon and have enjoyed it on the weekend with my girlfriends son. However, I recently have avoided it bc of the sugar. I also don't want the sugar to affect my state of ketosis.
When I have a bit of hunger, I drink water to see if I'm really hungry or not. My hunger signals can be mistaken for being thirsty at times. But if I'm still hungry shortly after I drink water, then I being to prep my meal.
I think measuring your body is a good way of tracking.