Don't settle on simple cheese
"There are so many cheeses that work on melted sandwiches that people don't really consider," Fish said. "You can definitely switch things up -- even in a grilled cheese -- just by changing out your standard cheeses or blending them."
Higher-moisture cheeses are the go-to for these, as harder cheeses don't melt as well, and obviously melting is the key to a great cheesy sandwich.
"Try mixing pepper Jack and blue cheese together -- it's an excellent combo, and very easy to do, even at home," he added.