1 1/2 oz of sweet sherry (or dark sherry)
1 oz of Gin
1/2 oz of Lemon Juice
1/4 oz of sugar syrup (or simple syrup)
4 oz of soda water
Shake the sherry, gin, lemon juice and syrup in a shaker. Strain into a frosted highball glass half filled with ice, then add chilled soda. Garnish with a lemon slice and a cherry, and serve with straws and a muddler.