In a saucepan
, combine sugar, cocoa, flour and milk until smooth. Add butter. Bring to a boil - cook and stir for 2 mins. Remove from heat. Stir a small amount of hot mixture into eggs. Return to pan. fold
half of cherry pie filling in. Pour into pastry shell. Bake
at 350 degrees for 35-40 mins. Cool completely on wire rack. Before serving top with remaining pie filling.