In April to honor of National Grilled Cheese Month , we decided to hand out "melt-ability" grades to some of our favorite fillings.

But we couldn't think of a better day than National Cheese Day (June 4) to break it out again.

What is melt-ability? Why, it's the ease and ability to melt, of course.

Check out where each cheese ranks and our suggestions for additional toppings. And don't forget to tell us how you make your grilled cheese!