Watermelon sherbet

Ingredients:

4 cups diced seeded watermelon
1/2 cup granulated sugar
3 tablespoons lemon juice
1 envelope unflavored gelatine
1/4 cup cold water
1 cup skim milk

Preparation:

Combine watermelon, sugar and lemon juice. Refrigerate 30 minutes.
Spoon half of mixture into blender container. Process until smooth.
Repeat with remaining watermelon mixture.
Combine gelatine and cold water in a small saucepan.
Cook over low heat, stirring constantly, until gelatine is dissolved.
Gradually add dissolved gelatine to watermelon mixture, stirring well.
Add milk and pour into freezer can of a 1 gallon electric freezer. Freeze according to directions.