1tbsp. flour
1/2 c. sugar
1 egg
2 tbsp. apple cider vinegar
1 (8 oz.) can crushed pineapple
4 c. sliced, cubed apples (Red Delicious)
8 oz. Cool Whip

Drain pineapple and reserve juice. Combine flour and sugar; mix well. Beat egg; add to flour mixture. Add vinegar and pineapple juice. Cook on low heat, stirring until thickened. Cool. Pour dressing over apples. Mix in Cool Whip. Refrigerate until ready to serve.