Base: 2 cups flour 4 tsp sugar 3/4 cup margarine Blend thoroughly and press into bottom of 13x9" pan. Bake at 375 degree F for 15 minutes. Filling: 4 cups rhubarb 1-1/2 cups sugar 3 Tblsp flour Juice Rind from 1 orange 3 beaten egg yolks Bring filling ingredients, except egg yolks to boil and simmer until thickened, stirring constantly. Remove from heat and add egg yolks. Cool slightly. Cover partially cooked base with filling. Meringue: 6 Tblsp sugar 3 egg whites Whip and cover filling. Bake at 350 degrees F for 15 minutes.