Frozen Tropical Terrine with Mango-Blackberry Sauce

Name: Frozen Tropical Terrine with Mango-Blackberry Sauce
Yield: Makes 8 Servings
Ingredients: 1 7-ounce package sweetened flaked coconut, toasted, divided; 2 pints pineapple-coconut ice cream, divided; 1 pint mango sorbet; 1 pint boysenberry sorbet; 1 large mango, peeled, pitted, sliced; 2 1/2-pint containers blackberries; 1/4 cup sugar; 1 vanilla bean, split lengthwise