For filling, mash and strain beans. Combine with sugar; and 1/4 teaspoon salt, butter and milk Cook, stirring until sugar dissolves. Cool For pastry, sift flour with 1/2 teaspoon salt.
Cut in shortening. Add warm water to form ball. Divide Into 8 parts. Roll each Into a 4 inch square. Top with mound of bean filling. Fold in all corners and seal. Place on cookie sheet. Brush with egg yolk mixture. Bake at 425° F for 15 to 20 minutes or until golden.Servings: 8 pastries