In a sense...yes. You could put it that way. No magic was involved in making it...just in heating it back up.

[The words are a bit slow and distracted due to the man being preoccupied with that first tidbit his grandson had shared. Mom in this case he's almost certain means Emma...so Emma and Hook went back in time using magic? As a joke even it made no sense, besides why would Henry even bother to say such an inane thing if it wasn't in some way true.]

How did they accomplish that? Emma and Hook I mean.