Whisk the flour & sugar together. Beat eggs until light, and whisk in flour & sugar.
Drain a can of pineapple tidbits into a 2-cup measure, add the lemon and orange juices, and pour in enough vinegar to make 1-1/4 cups total liquid. Add to the egg mixture. Cook in double boiler, stirring constantly, until thickened.
Chill thorougly, then fold in whipped cream.
Fold into your mixed fruit--we like to use 2-3 apples, 2 oranges, 3-4 bananas, about 1 cup grapes, some cherries (fresh, frozen, or canned), any other fruit in season, and some little marshmallows. You could also add chopped nuts, coconut, or anything else that sounds good!