Cook the Acini De Pepe pasta according to package directions. When done, rinse under cold water in strainer. Let cool.

In a saucepan over medium high heat stir together pineapple juice, sugar, flour, salt and egg. Cook and stir constantly until mixture thickens and is smooth. Remove from heat and stir in lemon juice. Let cool.

In a large mixing bowl combine the pasta and thickened mixture. Then gently fold in the mandarin oranges, crushed pineapple, pineapple tidbits, marshmallows and coconut. Fold in cool whip. Refrigerate until ready to serve.