Pre-heat oven to 325 degrees F, bake 12 to 15 minutes.
Beat butter & all sugars
Add egg, oil & vanilla mixing well after each addition
Add oats, cornflakes & nuts stir well.
Combine flour, baking soda & salt, then add this to STEP-1 & stir thoroughly.
Form into 1 to 1 & 1/2 inch balls & place onto ungreased cookie sheets.
Dip fork in water, then flatten cookies.
Allow to cool on cookie sheet, 2 to 3 minutes, then remove to wire rack to cool completely.