Watermelon Margaritas

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2 teaspoons sugar
1 lime wedge
3 1/2 cups cubed seeded watermelon
1/2 cup tequila
2 tablespoons sugar
3 tablespoons fresh lime juice
1 tablespoon Triple Sec (orange-flavored liqueur)
Lime wedges or watermelon balls (optional)
Preparation
1. Place 2 teaspoons sugar in a saucer. Rub the rims of 6 glasses with 1 lime wedge; spin rim of each glass in sugar to coat. Set prepared glasses aside.

2. Combine watermelon and next 4 ingredients (through Triple Sec) in a blender; process until smooth. Fill each prepared glass with 1/2 cup crushed ice. Add 1/2 cup margarita to each glass. Garnish with lime wedges or melon balls, if desired.