Mix the crumbled yeast with a little sugar or a little lukewarm water until liquid. Put all ingredients in a large bowl with a lid, put the lid on and shake well. At the end stir again with a wooden spoon and then let rise in a warm place for about 1 hour.
Shape small rolls with floured hands and place on a baking sheet lined with baking paper. Sprinkle with cheese, poppy seeds, sesame seeds or other grains and bake for 30 minutes at 200 ° C.