Mix brown sugar, butter, eggs and vanilla in large bowl. Stir in flour, soda and salt. Add oats and mix well. Reserve 1/3 of oatmeal mixture for topping. Press remaining oatmeal mixture into GREASED cookie sheet.
Filling
Heat chocolate chips, milk,and butter in saucepan over low heat. Stir constantly until chips are melted. Remove from heat and add nuts, vanilla and salt. Spread over oatmeal mixture in pan. Drop reserved mixture by spoonful onto choc filling.Bake at 350F until golden brown. 25-30 minutes. Cut into bars while STILL WARM!ENJOY!