If I had the chance to eat any cheeseburger in the world, there is no doubt that I would head to In-N-Out Burger for a Double Double (mustard, ketchup & lettuce only). Mmmmm…I’m starting to get hungry, just thinking about it. I can’t say that I love all cheeseburgers, because that would be a lie. I don’t like burgers that are too thick, too under done (medium well for me) or ones with fancy epicurean toppings or fillings – just American cheese, please. Even adding ketchup became a later fact, only because Stephanie Zinone asked…