For the melon cocktail, seed the watermelon, mash and pour into a shaker. Add syrup, lemon juice and shake.
Pour into a highball glass filled with ice cubes and top up with mineral water.
Add 1 scoop of lemon sorbet to the glass just before serving and serve decorated with a slice of melon on the rim and some mint.
This melon cocktail is very light and ideal for summer. Thanks to no alcohol also suitable for children!