Mix together the wheat, chestnut and rye flours with the salt and yeast in a bowl. Add the olive oil and water and mix well to bring the dough together. If it doesn't all join into a ball, add a few drops more water if needed.
Lightly flour a clean surface and knead the dough for around 3 - 5 minutes until it's smooth and not sticky. Transfer to a clean bowl, cover and leave at warm room temperature to double in size.
Once the dough has risen, divide it into six equal pieces. Form each piece into a smooth ball by lightly stretching out the sides and folding them over and under to give a taught top with the joins underneath. Roll lightly in your hands.
Place the rolls on a lined baking sheet, cover and leave to rise further around 30 - 40 minutes until they look lightly puffy.
Towards the end of the rise, preheat the oven to 425F/220C. Bake the rolls for approximately 15 minutes until lightly brown and hollow sounding when you tap the bottom. Allow to cool a few minutes before cutting open.
Video
Notes
If you prefer, you can make the dough into a single loaf instead. It will probably need to rise longer on the second rise and will take nearer 30 - 40 minutes to bake.