This is my husband's favorite sandwich, he loves fried egg sandwiches and also grilled cheese and this is a combination of the two. The secret ingredient here is mayonnaise, you put it on the outside of the bread instead of butter. I know that you all are probably think I am crazy, but I learned this trick working at a restaurant in college. Mayo on the outside of the bread will give you that crispy, crunchy, buttery goodness that you can only seem to get when you order grilled cheese from an old diner. Yum!