Total time: 10 minutes
Wedge of lime
2 teaspoons coarse margarita salt
14 ounces ruby red grapefruit juice, with pulp (about 3 medium grapefruits)
1 ounce lime juice
5 ounces reposado tequila
2 ounces triple sec
4 slices grapefruit or twists
1. Run a lime wedge halfway around the rims of four margarita glasses and dip into salt. Set aside.
2. Combine 7 ounces grapefruit juice, one-half ounce lime juice, 2 1/2 ounces tequila and 1 ounce triple sec in a cocktail shaker. Shake over ice until chilled. Strain into two ice-filled, salt-rimmed margarita glasses.
3. Garnish with a twist or slice of grapefruit. Repeat to make two more cocktails.
Each serving: 174 calories; 1 gram protein; 17 grams carbohydrates; 0 fiber; 0 fat; 0 cholesterol; 2 1/2 mg. sodium.