White Fruit Salad - cooking recipe

Ingredients

1 large can pineapple slices, drained and cut in small pieces
1 lb. marshmallows
1 1/4 c. grapes, cut and seeded
4 egg yolks
1/4 c. milk
1 Tbsp. dry mustard
juice of lemon

Preparation

Cook dressing (last 4 ingredients) in double boiler until as thick as it will get.
Cool.
Whip 1/2 pint whipping cream.
Fold in cold dressing.
Pour over fruit mixture and let stay in refrigerator overnight.