Cream together the butter and brown sugar. Add the
vanilla. Add the rolled oats, flour and baking soda. Rub
together to form a crumb mixture. Press ½ of the mixture into an
ungreased 9 x 11 pan and put the pie filling on top. Sprinkle the rest of
the crumb mixture over the pie filling.
Bake @ 350F for 30 minutes.