Soak the raisins in a cup of warm water for 5 minutes.
Preheat the oven to 180C degrees (356 F).
Mix the dry ingredients in a bowl: flour, potato starch, breadcrumbs, sugar, and salt.
Add egg, oil, lemon zest and juice, and grated apple.
Stirring, pour in the milk until the mixture is smooth and lump-free. It seems almost like a batter.
Drain the raisins, pat dry with kitchen paper, pour into the mixture, and stir.
Grease the mold and pour in the mixture. Bake for about 50 minutes.
Remove from the oven, brush the surface with honey, and let cool before slicing.
Store the leftovers for some days out of the refrigerator.