1Heat oven to 350ºF. Spray rectangular pan, 13x9x2 inches, with cooking spray.
2Beat egg, oil, buttermilk, bananas, granulated sugar and vanilla in large bowl. Stir in flour, oats, baking soda, baking powder, cinnamon and cloves. Stir in nuts and raisins. Pour into pan.
3Bake 30 to 35 minutes or until toothpick inserted in center comes out clean; cool. Sprinkle with powdered sugar.