Home made

Whenever I see a restaurant advertising their food as home made, It just bothers me.  It's not home made.  You made it at the restaurant.  It's restaurant made.   I can understand that they're saying it's not produced in some sort of factory, but still.  If you had meat and buns from McDonalds and cooked them on your bbq would you call that home made?  What is the definition?  This keeps me up at night.