Reduce the balsamic vinegar by half with 20 g of the soft brown sugar.
Dry the pain d’épice in the oven, then grind it to a powder. Mix it with the melted butter, flour and sugar. Cook this mixture in a 180°C oven on baking paper until golden brown.
Prepare the polenta by bringing the milk to the boil with the sultanas, pour in the polenta in a