2 ounces tequila 1/2 ounce agave nectar 1 ounce freshly squeezed grapefruit juice 1/2 ounce freshly squeezed lime juice 1/2 teaspoon grated fresh ginger Pinch of cayenne pepper Ice cubes Grapefruit wedges, for garnish Fill a shaker with ice. Add the tequila, agave nectar, grapefruit juice, lime juice, ginger and cayenne pepper. Shake well. Strain into a Margarita glass over ice. Garnish with the grapefruit wedges and serve.