For the gelato sundaes: Top the cookies with a large scoop of pistachio gelato, drizzle with hot fudge and sprinkle with pistachios.
For the sorbetto sundaes: Mix together the strawberries, sugar and lemon juice in a bowl and let macerate for 15 minutes. Place a large scoop of lemon sorbetto on each cookie and top with some of the strawberries and their juices and garnish with mint sprigs.