Heat oven to 350 (175 C). Lightly coat a 9x13 inch baking pan with cooking spray, then dust lightly with flour.
2
In a large bowl, cream sugar and margerine with an electric mixer; beat in egg, egg white, pumpkin puree and buttermilk.
3
In medium bowl, combine flour, oats, pumpkin pie spice, baking soda and salt. Stir into pumpkin mixture just until moistened, then add cranberries and mix gently.
4
Spread batter in pan and bake 20 to 25 minutes or until center springs back when gently pressed. Cool and cut into 18 bars.