Pie irons are great! My wife calls the sandwiches 'Jaffles'. It's a New Zealand thing. We have a shop here in town called Zookz that makes 'em to go!
Look them up, and you can see their menu page for a few more killer combos.
These are some of my wife's favorites to make at home.
Savory hamburger (she calls it mince) pre cooked of course
Ham, cheese and pineapple
She also does a mix of spaghetti O's or Campbell's cheesy spaghetti, cheese, finely diced onion and lightly cooked bacon. Sounds weird but tastes great.
---Ford---