Ducana (Antiguan Sweet Potato Dumpling)

Name: Ducana (Antiguan Sweet Potato Dumpling)
Cuisine: American, Latin American
Ingredients: 1 cup finely grated sweet potato; 3/4 cup fresh (grated coconut); 1/2 cup granulated sugar; 2 tablespoons unsalted butter (room temperature); 1 teaspoon ground cinnamon; 1 teaspoon vanilla extract; 3/4 teaspoon freshly grated nutmeg; 1/4 cup raisins (optional); 1- 1 1/2 cups all purpose flour; 1/4 cup water; Banana leaves and kitchen twine/foil for wrapping