Preparation time: 20 minutes + freezer time
600g melon (can be any type)
350ml good-quality prosecco
2 tsp lemon juice
Blend melon and transfer to a large bowl. Add prosecco, sugar and lemon juice. Mix with a wooden spoon until sugar has dissolved.
Transfer mixture to a shallow freezer-proof container and cover with plastic wrap. Place in freezer for 1-2 hours, then using a fork, grate frozen mixture to create small ice crystals. Return container to freezer for another hour, repeating process 3-4 times until you have well separated ice crystals.
Serve in 4-6 prosecco flutes or short glasses.