Melt chocolate and margarine in microwave on HIGH for 1 1/2 minutes or until melted, stir until blended, gradually add milk. Mix sugar, cornstarch, and salt. Beat in eggs and vanilla. Gradually blend in chocolate mixture. Blend in PECAN SHED PECANS and coconut. Pour into pastry shell. Bake at 375 degrees for 45-50 minutes or until top is puffed and browned. Filling will be soft but will set while cooling. Cool at least four hours before serving.