Frozen Watermelon Marguaritas from Foodnetwork

Puree 1 1/2 cups cubed watermelon
1 cup mango  tequila
1/2 cup each lime juice and orange liqueur
1 to 2 tablespoons confectioners' sugar
1/2 teaspoon salt
3 cups ice in a blender.

Divide among glasses; garnish with lime and watermelon.