A long-time favorite

I've been trying to make new ways to jazz up my grilled cheese sandwiches..... and I think i found one of my new compilations. American cheese, Havarti cheese (If you haven't tried it yet put it on the top of your list!), and some tomato slices (I've already started looking forward to fresh summer tomatoes).

Does anyone have any other ways they serve their grilled cheese gooeyness?