Heat oven to 160C/140C fan/gas 3.
Grease and line a 2lb loaf tin with baking
parchment (allow it to come 2cm above
top of tin). Mix the flours, bicarb, baking
powder and a pinch of salt in a large bowl.
Mix the bananas, syrup, eggs and yogurt.
Quickly stir into dry ingredients, then gently
scrape into the tin and scatter with nuts,
if using. Bake for 1 hr 10 mins-1 hr 15 mins
or until a skewer comes out clean.
Cool in tin on a wire rack. Eat warm or
at room temperature, with low-fat spread.