When I was growing up, my Grandmother would make these in the toaster oven, I make them in my oven under the broiler. They were most often served with spaghetti with meat sauce, or any hearty tomato dish where you might want cheese bread. In my family we like to let them cook until they are very dark on top...keep an eye on them...One minute they will just be bubbly, the next they will be black on top..(which is still tasty!) I sometimes use Light Cheese Wiz to prepare this recipe, and the butter and cheese wiz amounts should be altered according to taste.