Place 2 slices of cheese evenly on one slice of bread.

Add 1 slice of sandwich ham and a handful of mozzarella cheese on top of the cheese.

Spread butter thinly on the outer sides of both slices of bread.

Place the buttered bread on top to form a sandwich.

Heat a pan and melt some butter, then toast the sandwich on the unbuttered side first over low heat.

Once the cheese starts to melt and acts as a glue, flip the sandwich and toast the other side.