Concord Grape Jelly Pie

Description
This recipe came from an estate sale. I obtained it when I purchased the family collection from the Turner Estate in Dallas, Texas in 1997.
 * Contributed by Catsrecipes Y-Group

Ingredients

 * 1 cup sugar
 * ¼ stick butter
 * 4 egg yolks
 * 1 cup concord grape jelly
 * 2 teaspoons vanilla
 * 1 pie shell
 * 4 egg whites

Directions

 * 1) Cream butter and sugar then add well beaten egg yolks, jelly and vanilla.
 * 2) Fold in beaten egg whites then fold into pie shell.
 * 3) Bake at 350°F for 10 minutes then reduce heat to 300°F and cook 30 minutes longer.