3 cups seedless-watermelon chunks (about 1 lb. peeled watermelon)
1 1/2 cups fresh lime juice
1/2 cup sugar
1 cup tequila
1/2 cup Grand Marnier
Combine watermelon chunks, lime juice and sugar in a blender, and blend on high until completely liquid and frothy. Combine in a pitcher with tequila and Grand Marnier. Fill pitcher with ice, stir and serve.
[ via Domino magazine, August 2008 ]