Sourdough rye bread
2 kg. rye flour
1 litre of water or a 1:1 mixture of water and whey
1 tsp salt
Put the rye flour into a large bowl. Warm the water and add the salt and then add the water to the rye flour and mix well together. Turn out onto a floured table and knead until smooth and free of cracks. Rub a little bit of cooking oil on your hands and form the dough into a loaf. Put the loaf into a well-oiled container - Icelanders often use tins, but a cooking pot or a casserole dish may be used as well. It has to fit inside another, larger container. The dough must not fill the container as it will rise (the genius who wrote the recipe book unfortunately does not say by how much).
Put a damp cloth on top of the container and leave to rise in a warm spot overnight. When the dough has risen, put baking paper on top of it and then close the baking container (with a lid, or if that‘s not available, with aluminium foil). Now put the baking container into another container that is both deeper and wider, with a rack or metal trivet in the bottom so the water will flow under as well as around the bread container. Pour water into the second container until it reaches the middle of the first one. Close the second container tightly.
Cook over low temperature for 3 hours, or bake at around 120 °C for the same amount of time. After 3 hours, remove the bread from the container, turn it over and return to the container, close both containers tightly and return to the heat/oven for 3-4 hours. Remove and cool.