Seems basic, but most people cook it too fast, and end up with burnt bread and un-melted cheese. It takes a bit of patience to get the perfectly toasted crispy buttery bread filled with oooey gooey melty cheese.
Sure you can dress it up with bacon, ham, pickles or any number of things but there is something of pure innocent glory in a grilled cheese. Paired with soup or salad it is perfection.