Heat oven to 375°F. In large bowl, beat brown sugar, shortening and granulated sugar on medium speed of electric mixer until creamy. Add egg, water and vanilla; beat well. Add combined oats, flour, salt and baking soda; mix well. Drop dough by rounded teaspoonfuls onto ungreased cookie sheets. Bake 9 to 11 minutes or until edges are golden brown. Remove to wire rack. Cool completely. Store tightly covered.