Preparation

• Combine the water, 2 cups of the sugar, basil, and cucumber slices, and steep for 30 minutes. Strain and chill.
• Combine the remaining 1/2 cup sugar, salt, and zest in a shallow bowl or plate. Lightly moisten the rims of two large margarita glasses. Dip each glass in the sugar mixture.
• Add the tequila, 2 oz. of the simple syrup, the lime juice, and Grand Marnier to a shaker. Fill with ice and shake.
• Fill the prepared glasses with ice. Divide the margarita mixture between the glasses, and garnish each with a cucumber slice and a basil sprig.