Heat oven to 190ºC degrees. Beat margarine and sugar until creamy. Add eggs, milk, and vanilla; beat well. Add flour, baking soda, and salt; mix well. Stir in oats, chocolate chips, and nuts; mix well. Drop by rounded measuring tablespoonfuls onto ungreased cookie sheet. Bake 9 to 10 minutes for a chewy cookie or dozen to 13 minutes for a crisp cookie. Cool 1 minute on cookie sheet; remove to wire rack. Cool completely.