Chess Pie with Blackberry Sauce Recipe

4 tablespoons(1/2 stick) unsalted butter
1/2 cup sugar
5 egg yolks
1 tablespoon flour
2 cups milk

Preheat oven to 350 degrees. Roll dough out thin and use to line a 9-inch pie pan. Set aside. Cream the butter and sugar together until light. Beat in yolks all at once. Mix in flour well. Stir in milk and mix well. Pour into crust and bake about 1 hour, or until set and lightly browned.
Blackberry Sauce: ""When rasberries are in season they make a very attractive sauce, too."" Approxiamtely 2 cups(10 oz.) fresh or frozen blackberries 1/4 cup sugar 2 tablespoons freshly squeezed lemon juice 1 tablespoon dark rum
Combine the berries, sugar, and lemon juice in a small enameled saucepan. Simmer over low heat for about 15 minutes. Stir in rum. Serve either hot or cold. Makes about 1 3/4 cups. Note: If berries have not been frozen previously, you can freeze this sauce. Allow it to thaw in the refrigerator.