El Presidente Cocktail #3

1 1/2 oz white rum
3/4 oz dry vermouth
1/2 oz Cointreau orange liqueur
1/2 oz lemon juice
1 dash grenadine syrup

Combine all ingredients in a cocktail shaker half-filled with cracked ice; shake well and strain into a chilled cocktail glass. Garnish with an orange twist. Grenadine and lemon juice are optional.