Mix the flour, salt and yeast in a bowl. Add the chestnuts, bacon, oil and water, mix and knead into a soft, smooth dough. Cover and leave to rise at room temperature for approx. 1 3/4 hrs. until doubled in size.
With floured hands, divide the dough into 6 even pieces and shape into oval bread rolls. Place on a baking tray lined with baking paper. Combine the water and icing sugar, brush the rolls with the mixture and leave to rise for a further 15 mins. Dust the bread rolls with a little flour. Using a knife, make several crosswise incisions approx. 5 mm deep.
For approx. 25 mins. in the lower half of an oven preheated to 200°C.