1. Preheat the oven to 175° top and bottom heat.
2. Finely chop the nuts. If used, also finely chop the dates.
3. Mash the bananas in a bowl with a fork to a fine puree.
4. Add the flour and baking powder to the bowl and mix well. Then add all the other ingredients and mix to a dough.
Pour the dough into a floured loaf pan and bake in the oven for about 50 minutes at 175°C top and bottom heat. Let the bread cool down completeley.