1Grease and line a 8½ x 4½ inch loaf pan with parchment paper.
2Insert the wire rack into the middle shelf position. Preheat the oven. Select BAKE/CONVECTION/325°F/1 hour 20 minutes and press start.
3Place the mashed banana, sugar, eggs, oil and milk in a large bowl and whisk to combine.
4Sift the flour and baking powder together over the banana mixture. Add the salt and stir gently to combine.
5Pour the mixture into the prepared pan.
6Slice the extra banana in half lengthways, peel and place cut-side-up on the batter. Brush the banana with the maple syrup.
7Once preheated, put the banana bread in the oven and bake for 1 hour 20 minutes until a skewer inserted into the center comes out clean. Don't insert the skewer into any of the cracks as this will give an inaccurate reading.
8Let cool in the pan for 10 minutes before turning onto a wire rack.
9Slice and serve warm with butter.
Tip: You will need about 3 large overripe bananas for the mashed banana.