Fluffy cooked rice Flaked coconut Toasted slivered almonds In a heavy saucepan, combine pineapple juice, water, and cornstarch (when you've mixed with a little of the water first). Cook over low heat until thickened. Add pineapple chunks and tuna and reheat and simmer for 5 to 10 minutes. Serve over fluffy rice and top each serving with a sprinkling of coconut and slivered almonds.