Not Your Kids Grilled Cheese (with roast beef, two cheeses and caramelized onion)

Grilled Cheese, is still, to date, my favorite thing to eat. However, if I serve up a plain old grilled cheese, my family would be wondering what else is coming. So I turned my plain old grilled cheese into something filling and main course worthy! I took it a step further and made my own bread (with a bread machine). Recipe for that can be found on my blog. You can certainly use store bought bread, but get a nice thick cut. Caramelizing the onions, takes a few minutes, but worth the wait!