Blackberry Julep

1 1/2 oz Marie Brizard creme de mure
1 oz fresh lemon juice
1/2 oz simple syrup
1 tbsp mixed-berry marinade
1 oz water

Shake blackberry liqueur, lemon juice and simple syrup with ice, and strain into a highball glass filled with crushed ice. Stir until the glass begins to frost. Garnish with the berry marinade, and serve.