Watermelon Mint Margaritas

4 cups seeded and chopped watermelon
lime juice
finely granulated sugar or salt
1/2 cup tequila
1/4 cup granulated white sugar
1 tablespoon grated lime zest
1/4 cup freshly squeezed lime juice (about 3 limes)
2 tablespoons chopped fresh mint
mint leaves and/or watermelon wedges, for garnish (if desired)


Place the watermelon chunks in a single layer on a baking sheet. Freeze for 4 hours, or until firm.
Coat the rims of cocktail glasses with lime juice; dip in sugar or salt.
In a blender, process the frozen watermelon, tequila, sugar, lime zest, lime juice and mint until slushy. Pour into glasses. Garnish, if desired.