Watermelon Pudding Recipe

2-1/2 pounds ripe watermelon
1/4 cup sugar
1/4 cup cornstarch
1 teaspoon orange blossom water
Pinch of ground cinnamon
1-1/2 ounces bittersweet chocolate, cut into small pieces
2 tablespoons chopped pistachios plus extra for sprinkling
PREPARATION:
Cut watermelon into chunks and remove rind and seeds. Put watermelon through a food mill or process in a blender to get about 2 cups juice.
Combine the watermelon juice, sugar and cornstarch in a saucepan, and stir until the cornstarch completely dissolves.