Storage: This dish is best served at room temperature. If marinating overnight, bring it out of the refrigerator 30 minutes before serving.
Substitutions: Prosciutto di Parma is ideal, but any high-quality thinly sliced prosciutto will work. Fresh mozzarella balls (ciliegine) are traditional, but bocconcini cut into cubes is a suitable alternative.
Tips: Ensure the mozzarella is well-drained before marinating to prevent the oil from becoming watery. For a milder heat, reduce the red-pepper flakes.