Beat the egg. Add the oil and sugar. Mix. Add to the mashed bananas. In another bowl mix the flour, baking powder, sugar and salt. Add this to the wet mixture. That's it. Bake about an hour at 350F or until a toothpick comes out clean. Sometimes it 75 minutes. I use a 9x5 pan. You can add almost anything. Sometimes I use walnuts or sunflower seeds. It's much better if kept refrigerated.