01 -
Slice the mozzarella thinly and pat it dry with paper towels. This keeps extra moisture from soaking into the bread.
02 -
Lay out the bread slices. Spread pesto on the inside of each slice, using a thin, even layer and leaving a small border around the edges.
03 -
Divide the shredded cheese, prosciutto, mozzarella, and basil between 2 bread slices. Close with the remaining bread, pesto-side down.
04 -
Spread softened butter over the outside of each sandwich from edge to edge. This helps the bread brown evenly.
05 -
Heat a skillet over medium-low heat. Cook the sandwiches for 3-4 minutes per side, pressing gently, until the bread is golden and the cheese is melted.
06 -
Transfer to a cutting board and rest for 1 minute. Slice in half and serve while the cheese is still warm and soft.