Preheat oven to 180ºC . In a medium sized bowl, cream together butter & honey till mixture is smooth. Beat in eggs one at a time. Stir in bananas, buttermilk & vanilla. When well blended, mix in baking powder, soda & salt. Blend in the rest of the ingredients. Turn mixture into a buttered loaf pan 23 cm by 13 cm by 8 cm. Bake for 55 minutes. Cool on wire rack. "The Vegetarian Times Cookbook"