Rhubarb Pie - cooking recipe

Ingredients

4 c. rhubarb
1 1/2 c. sugar
1/4 c. Minute tapioca
3 egg yolks, beaten
1 Tbsp. butter or margarine
1 baked pie shell
3 egg whites
6 Tbsp. sugar
2 Tbsp. lemon juice

Preparation

Combine rhubarb, 1 1/2 cups of sugar, tapioca, egg yolks and lemon juice in top of a double boiler.
Cook until done.
Stir in butter.
Cool mixture, then pour into baked pie shell.