Chef's Tips for Better Burgers  Burgers might just be my favorite food.  Now, there's not a thing wrong with the good old-fashioned American Cheeseburger, in fact, it's awesome, but if you feel like expanding your horizons just a bit, here are my three favorites "gourmet" burger styles, as well as some tips for cooking a better burger.  All the patties for these recipes are prepped and grilled the same way, so it's easy to make a big batch of one recipe, or set up a burger-bar and let your guests…