Use a sharp knife and cut the loaf of bread in half vertically (kind of like you're making a very long sandwich)

Cut your two skinny, long loafs into thirds so that you have 6 total pieces

Butter all pieces of bread on the cut side so that it covers the whole slice

Sprinkle a small amount of garlic salt around each slice so that there is enough per bite. I personally made a mix of the cheeses and garlic salt so I can do both at the same time

Fold the Pepper Jack slices in half so that each half can fit onto a slice of bread. Put the cheese on the bread

Using a cheese slicer, cut six slices of cheese (approx. 4 inches long each) and place on top of Pepper Jack slices. Here is a picture for reference of the cheese slice sizes

Grease a cookie sheet or cooking pan and place the slices of bread onto the pan. Put in the oven for 15 minutes

The bread should be browned around the edges and the cheese should be bubbling. You may need to adjust the heat depending on your oven. You're good to go otherwise!