Dissolve the yeast in the water and add sugar and salt. Then add the flour and stir into a smooth dough. Let the dough stand for about 10 minutes (in winter I put it on the window sill over the heater, in summer usually with a fan oven at 50 ° C). Then form 9 rolls out of the dough, place them on the baking sheet and let rise for another 10 minutes. (In winter I just leave them on the stove because the apartment is warm from heating, in summer I put them in the oven at 50 ° C.) Preheat the oven to 250 ° C (remove the tray with the rolls from the oven) and bake the rolls for 10 minutes at this heat. Brush with a little water after 10 minutes and bake for another 20 minutes at 200 ° C. If you want cheese rolls, you can put cheese on the rolls about 5 minutes before the baking time. Delicious. If the dough sticks strongly while kneading, simply dust the flour over it.