Mix the flour and sift into a bowl. Press an indentation in the middle. Crumble in the yeast and add the sugar. Mix 1/4 of the water (lukewarm) with the yeast, dust with flour and cover and let rise in a warm place for 20-30 minutes.
Then add the remaining warm water, salt and coriander and knead into a dough. Cover and let rise for one to two hours until the volume has doubled. Grease a baking sheet, knead the dough again and form one or two round loaves (per recipe). Let rise again on the baking sheet for about 1/2 hour.
Score the top crosswise with a knife, brush with milk and place in the oven preheated to 190-200 ° for about 1 1/4 hours (about an hour`s baking time for 2 loaves).