Step 1

Place the jelly crystals and a few drops of food colouring in a small sealable plastic bag and rub between fingers gently to distribute the colour. Add the icing sugar, citric acid and bicarb to the bag and shake well to combine.

Step 2

Lightly whisk the egg white in a shallow bowl. Pour some sugar mixture on a plate. Dip the rim of a glass into the egg white and then in the sugar mixture to coat the rim. Repeat with remaining glasses. Set aside while making the cocktail.

Step 3

For the cocktail, combine the gin, cranberry juice, lime juice and caster sugar in a jug. Stir until sugar has dissolved.

Step 4

Divide the cocktail mixture among the prepared glasses. Top each glass with cold Prosecco.

Step 5

Add a wedge of lime, a sprig of fresh mint and a cherry to each glass. Serve immediately.