Chilled Watermelon Soup

6 pounds yellow or red seedless watermelon, diced (9 cups)

2 tablespoons chopped fresh mint

1 tablespoon sugar

2 tablespoons fresh lemon juice

1 cup lightly sweet white wine (such as Riesling) or 3/4 cup water mixed with 1/4 cup sugar

1 teaspoon chopped ginger

8 teaspoons crumbled feta

1/4 cup sparkling wine (or sparkling water)

Combine 1 cup of the watermelon with mint and sugar in a bowl. Set aside. Blend remaining 8 cups watermelon, lemon juice, wine, and ginger in a blender until smooth. Chill for 1 hour. Strain soup; divide among 8 bowls. Top each with 1/8 cup reserved watermelon and 1 teaspoon feta .