The Hairy Bikers served up planked salmon with rye bread on the banks of a river in Finland.

The ingredients for the rye bread are: 600ml strong beer, 20g fresh yeast, 400g rye flour, 2 tbsp yoghurt, 2 tbsp caraway seeds, 1 tbsp black treacle, 1 tbsp salt, 2 tbsp olive oil, plus a little extra for greasing, 800g strong white bread flour, polenta, for dusting and 1 free-range egg, beaten.