Line the baking tin (24 cm long) with baking parchment.
Preheat the oven to 180°C.
Peel, halve and core each of the pears. Slice evenly each half.
Add all the ingredients except the pears into a bowl and whisk them properly for a 1 minute using an electric whisk.
Pour the mixture into the loaf tin and even out the surface.
Gently lay the sliced halved pears next to each other on top of the mixture and sprinkle them with caster sugar. (You don’t have to press the pears into the cake mix as they will sink into the rising sponge during baking).
Bake for around 40 – 45 minutes or until a cake tester (you can use a bamboo skewer) comes out clean.
Let the cake cool down and dust with icing sugar before serving.