Cinderella

Ice cubes
2 measures orange juice
2 measures pineapple juice
1 measure lemon juice
1/2 measure gomme syrup
1 measure soda water

Half fill a cocktail shaker with ice cubes. Add the pineapple and orange juice, lemon juice and gomme syrup. Shake well and strain into an ice filled glass. Top up with soda water. Decorate with a slice of lemon.