Preheat oven to 350 degrees. Blend pie shell ingredients well, press into 9-inch pie plate. Bake 8 to 10 minutes, until lightly browned. Reduce oven setting to 250 degrees.
Mix filling ingredients thoroughly, pour into pre-baked pie shell; bake at 250 degrees for 5 minutes. Remove from oven. Reset oven to 350 degrees.
Whip egg whites and sugar until stiff peaks form. Spread meringue on pre-baked pie, working from outside rim to center to ensure that meringue seals to pie plate. Bake at 350 degrees for 3 to 5 minutes, until the meringue is golden brown. Chill thoroughly before serving.