Ingredients
1/4 cup blackberries
3 mint leaves
1 teaspoon raw sugar
1 tablespoon lime juice
3 ounces white rum
Cracked ice

Method - The Procedure
In a bar shaker crush together blackberries, mint leaves, sugar and lime juice with a mortar or the back of a spoon until the mixture becomes slightly mushy. Add rum and ice, shake and serve in Tom collins, garnish with a lime slice.