I would just be very honest with what happened. My personal opinion is that every experience, and this includes job gaps for any reasons, can shape your personnality for the best. If the guy in front of you don't see what's positive in there, then, it migth be a sign that you should look somewhere else.
This job gap probably had a huge positive influance on your life, since you now feel healthy, refreshed and passionate.
I personaly had a burnout and had to stop working for a couple of months. When I came back to work, my employer tried to convince me to leave the company. But when he realized I wouldn't, he finally abendoned the idea. That year, I surpassed all my goals!
Good luck!