Cream margarine; stir in oats, syrup, brown sugar and vanilla. Spread in 9 x 13-inch ungreased pan. Bake at 350 degrees for 15 minutes (no longer); cool. In saucepan melt chocolate chips and peanut butter. Spread over cooled bars and refrigerate for a few hours to cool chocolate. Cut into bars with a pizza cutter. Makes two dozen. Hint: Use pizza cutter to cut any cookie bars.