In a bowl place the eggs, sugar and beat until you get a fluffy and light cream.
Add the oil, wheat flour, milk and beat again until a smooth and homogeneous mass.
Add the baking powder and mix gently.
Grease a rectangular shape with butter or margarine, sprinkle with sugar, cinnamon, arrange slices of bananas cut lengthwise and on top pour all the dough sprinkling a little more cinnamon.
Bake in a preheated oven at 200°C for 40 minutes. Unmold and serve.