L.A.
The oven is at 350. You arent waiting to watch the chocolate melt. That kind of chocolate isnt made to melt unless it is stirred. I would start at 7 min and try to push an m&m in the middle...if it diesnt go smoothly,wait a few more minutes and try again. Every oven is so different. I think when we made them it was at about 10 min (but that was high altitude too) Enjoy!
PS I prefer the twisty pretzels vs the round, then your kiss doesnt sit on the cookie tray and it heats more evenly.