- Preheat oven to 350 degrees.
- Grease a 9x13 inch pan.
- In a large bowl, mix together margarine and sugar until smooth.
- Mix in yolks.
- Stir in flour and baking powder alternately with the milk.
- In another bowl, beat egg whites until doubled in volume.
- Fold beaten whites into the dough.
- Spread into a greased 9 x 13 inch pan.
- Slice bananas over the top of the dough.
- In a small bowl, mix together the 2 tablespoons sugar and the cinnamon; sprinkle over bananas.
- Bake at 350 degrees for 30 to 35 minutes, or until a toothpick inserted into the center comes out clean.
- Allow to cool.