Watermelon Martini

1 small (4 to 5 pound) seedless watermelon,
    peeled, and cut into chunks
1/3 cup very fine baker's sugar
3 tablespoons sweetened lime juice
1 1/2 cups vodka

Place watermelon chunks in a large bowl; add sugar and lime juice, stirring lightly until combined. Refrigerate for 1 hour for flavors to mix.

Spoon mixture into blender, then add vodka. Blend until smooth.

Serve immediately or refrigerate. If desired, serve in glasses that have had a lime run around the rim and then dipped in sugar.

Makes 6 glasses.