Pre bake tart shells until a golden brown. Sprinkle 1/3 cup chopped pecans into the tart shells. Combine in a saucepan the milk,brown sugar,butter and corn syrup. Bring to a boil stirring constantly and continue to boil for 5 minutes. Remove from heat and beat until it starts to thicken. Be carefull not to beat too long or it will get stiff. Devide among tart shells. Melt and spoon over tarts the melted chocolate. Top with a whole pecan.