In a bowl cream the margarine and sugar. Add the vanilla, the yolks and mix well.

Add the oatmeal, flour, baking powder and the apple. Mix well and add the lights until the mixture is homogenuous. Knead it 'til it doesnt adhere to your hands.

Do litle balls and place on a greased baking sheet(leave space between each cookie). Flatten the balls to give them cookie's form.

Preheat oven at 350°F. Bake 10 minutes per side or until done.