In a saucepan combine the sugar flour and salt Drain juice from oranges and pineapple into a 1-cup measuring cup cover and refrigerate fruit Add enough water to the juice if needed to measure 1 cup stir into the sugar mixture until smooth Cook and stir over medium-high heat until thickened and bubbly
Reduce heat cook and stir 1 minute longer Remove from heat Stir a small amount of hot mixture into egg return all to pan stirring constantly Bring to a gentle boil cook and stir 2 minutes longer Remove from heat In a bowl combine the macaroni and cooked dressing Cover and refrigerate for 8 hours or overnight
