You can post pictures in your comments below! Please feel free to share your P3 living stuff you're doing to help other P3toLifers visualize and get ideas for how to do this!
Disclaimer: Intermittent fasting is considered a controversial topic by some AND depending on your health may not be a good idea- so you are responsible for checking with your doctor or medical professional before doing this. I am not a medical professional and the following are just my opinions based on my own experience and the research that I've done. There are quite a few books that expound on both the history and proof of the efficacy of fasting and I firmly believe in it's use, when done the right way, myself.
Does it matter what type of steak or what size?
Again this is just me talking not scientific fact, but it seems to me that it's better in general to close a fast with a hearty meal - to me I feel like it's sending that signal to your body not to worry, you didn't eat for awhile, but now you are giving it just what it needs.
But at the same token, you wouldn't want to be eating so much that you eat all the calories you would have normally eaten that day- say 1500 calories or something, in one meal. Because then obviously there's no negative calorie balance for the day after all.
So there's a balance there. I wouldn't eat just like 100 grams of London broil on a steak day- I'd eat me some rib eye or something, but I wouldn't eat like 2 huge rib eyes either.
My feeling is that if you fast all day, and then have SUCH a meager dinner with very little food, it just seems like a potential warning signal for your body- you want to have it to go back and forth between eating nothing and having a sizable enough meal that your body feels like it's getting enough.