In a small saucepan, combine the pineapple, sugar, cream, cinnamon and ginger. Cook and stir over medium heat for 5 minutes.
Meanwhile, place the cake on a baking sheet and sprinkle with confectioners' sugar. Broil 5-6 in. from the heat for 3-4 minutes or until golden brown. Drizzle sauce over the cake; sprinkle with coconut.