Adapted from a recipe by Dale DeGroff.
.5 parts Cointreau
.5 parts Haskap liqueur
1.5 parts Grapefruit juice
.5 partsLemon juice
1.5 parts Tequila
Shake, and strain into a chilled cocktail glass.
Dribble the .5 oz of Haskap down the inside of the glass so it settles at the bottom.