Combine all ingredients in a mason jar, shake vigorously until the agave nectar dissolves, then add ½ cup ice and shake it up again. Pour into a rocks glass and squeeze a lime slice in there and then drop lime slice in the drink.
Serves 2 (in a 10 oz. rocks glass)
By Kate Bolt, #livinglark – To buy a copy of Kate’s new book Lark: Cocktails go to LivingLark.com