Grandmother'S Rhubarb Custard Pie
["4 c. finely chopped rhubarb", "2 Tbsp. flour", "1 1/4 c. sugar", "1 Tbsp. butter or oleo, melted but not hot", "2 egg yolks"]
["Let rhubarb stand in water for 10 to 15 minutes.", "Drain.", "Mix rest of ingredients together.", "Add rhubarb.", "Mix and bake in 2 single crusts for 30 to 35 minutes at 400\u00b0."]
["rhubarb", "flour", "sugar", "butter", "egg yolks"]