You had us at watermelon juice. A Grand summer in margarita form. Watermelon Margarita .75 Part Grand Marnier Cordon Rouge 1.5 Parts @Espolontequila .75 Part Lime Juice .5 Part Watermelon Juice .25 Part Simple Syrup Pinch of Salt Garnish with a slice of watermelon and an optional half salt rim.