Preheat the oven to 425F (220C). Line a baking sheet with parchment paper.
I like to use two 6-inch baguettes and cut them in half, but you can use any baguette or sliced bread that you like.
Cut the baguettes in half lengthwise, and place them onto the prepared baking sheet. Add a few slices of butter onto each bread half.
Fold the ham in half and layer 2 to 3 slices on top followed by a few thin slices of cheese.
Bake until the cheese has fully melted. My oven takes 10 to 15 minutes but cook time will depend on the oven.
A lot of times my parents/grandparents would only use the top element (broil) and just broil the sandwiches until the cheese was bubbly and melted so you can use this method too as opposed to baking at 425F.
Once the cheese is melted and the bread has crisped up, remove from the oven and enjoy!