Sift the flour into a large enough bowl. Sprinkle with dry yeast and salt. Mix everything by means of the baking horn or possibly the wooden spoon. Gradually add the water. At the beginning still mix with the wooden spoon or possibly the cooking spoon, later with the hands, first in the baking bowl, later on a dry surface.
Knead for 10 minutes. Shape the dough into a ball. Return this to the baking bowl. Cover with a wet dishcloth and leave in a warm place for 2 hours.
Divide the risen dough into two pieces as large as possible on the spot. Add the walnuts and knead until the walnuts are evenly distributed in the dough. Shape the dough pieces into oblong loaves. Place on an oiled or parchment paper-lined baking sheet. Cover the loaves with a damp dishcloth and let rise for another 30 minutes. Brush with cold water or sprinkle 1 tbsp. flour over the loaves using a flour sifter. Score each loaf three or four times to a depth of about 1 cm and bake in the oven heated to 220 °C for 1 hour.