01 -
Heat a large skillet over medium heat until evenly hot.
02 -
Spread softened butter evenly on one side of each bread slice.
03 -
Place two slices of bread, butter side down, onto the skillet. Evenly layer mozzarella on top, add a heated chicken cutlet to each, spoon marinara sauce over the chicken, and top with the remaining mozzarella.
04 -
Cover with a second slice of bread, butter side facing up, forming a sandwich.
05 -
Cook sandwiches for 3-4 minutes per side, gently pressing occasionally, until the bread is deep golden brown, crisp, and cheese is thoroughly melted.
06 -
Transfer to a board, cut in half, and serve immediately with your preferred accompaniments.