• Preheat your oven to 350°F (175°C) and prepare a 9x13-inch baking pan by lightly greasing it.

For the Bread:

• In a medium bowl, combine the flour, baking powder, and baking soda, sifting them to ensure a light texture.
• In a large bowl, cream together the margarine and sugar until fluffy before adding the eggs one at a time, mixing well after each addition.
• Gradually incorporate the flour mixture into the creamed mix in three increments, alternating with adding the mashed bananas, stirring gently to combine.
• Gently fold the chopped plums into the batter, ensuring they are well distributed without breaking them up too much.
• Pour the batter into the prepared pan, smoothing the top with a spatula. Bake for approximately 1 hour, or until the bread is golden and a toothpick inserted into the centre comes out clean.
• Allow the bread to cool in the pan briefly before slicing and savoring this moist and fruity delight.