Step 1

Prepare all the ingredients: Mash 4 bananas with a fork. Roughly chop the nuts and chocolate. In a small pot melt the butter, take it off the heat and let it cool.

Step 2

In a small bowl, mix the flour, salt, spices, baking powder, and baking soda together. Set aside.

Step 3

Prepare a 9x5 inch loaf pan (23x13 cm) or 10x4.5 inch (25.5x11.5cm) by buttering it and lining it with parchment paper.

Step 4

Preheat the oven to 325 °F / 160 °C / Gas Mark 3, no fan.

Step 5

Place the eggs and sugar in a mixing bowl, whisk with a mixer fitted with a whisk attachment on medium-high speed for 5 minutes until the mixture is pale, light and foamy.

Step 6

Add the mashed bananas and melted and cooled butter, mix until just combined.

Step 7

Sieve the flour mixture into the batter, stir in with a spatula, until partially combined.

Step 8

Add the chopped chocolate and walnuts, fold in, taking care, not to over mix the batter.

Step 9

Pour the batter into the prepared loaf pan.

Step 10

Lay the banana slices (the reserved ½ banana) on top.

Step 11

Bake for 55 minutes, or until a cake tester/bamboo skewer comes out clean. It may run longer or shorter in your oven.