Description: I'm posting this in answer to a request. I haven't made it myself. It was on a site called The Ice Cream Parlor. An ice cream maker is necessary. Times do not include chilling or freezing, and are guesses.
Ingredients:
1 cup sugar
1/2 cup water
1/4 cup lemon juice
3 cups watermelon
Steps:
Cook the sugar, water and lemon juice together, stirring occasionally until the sugar is dissolved.
Remove from heat and chill.
Cut up the watermelon and remove all seeds.
Puree in a blender or food processor.
Stir into chilled syrup.
Freeze in an ice-cream maker according to the manufacturer's instructions.
Pack into an airtight container and store in the freezer.