Step 1

Preheat your oven's broiler to high. Split open the hamburger buns and place on a large baking sheet.

Step 2

Coat the buns evenly with the butter.  Toast under preheated broiler for 1-2 minutes until golden.

Step 3

Switch the oven broiler off and preheat the oven to 375 degrees.

Step 4

Layer half of the ham slices evenly on the bottom of each bun.  Top with a slice of cheese.  Repeat these layers one more time.  Place the top buns on the sandwiches.

Step 5

Bake the sandwiches for 7-10 minutes, until cheese is melted.

Step 6

OPTIONAL:  In a small bowl mix together the mayonnaise and dijon mustard and serve with the hot sandwiches.