Preheat oven to 375°F (190°C).

Grease and flour an angel food cake pan.

Cream together the oleo (or butter), sugar, and egg in a large bowl until light and fluffy.

In a separate bowl, mash the bananas.

In another bowl, combine the flour and baking soda.

Add the mashed bananas, flour mixture, raisins (or dates), and nuts to the creamed mixture.

Stir until just combined. Do not overmix.

Pour the batter into the prepared angel food cake pan.

Bake for 60 minutes, or until a wooden skewer inserted into the center comes out clean.

Let cool in the pan for 10 minutes before inverting onto a wire rack to cool completely.

Slice and serve.