Make a smooth dough from the flour, salt, butter, yeast and the heated liquid and let rise for about 45 minutes. Then divide the dough into 8-9 steamed noodles and let rise for another 30 minutes. Put some oil in a pan with a heavy lid (glass if possible) and use it to roast the onion. Deglaze with 1/4 l water, salt and the bay leaf. Put steamed noodles in the boiling water. Cook with the lid closed on low heat for 30 minutes.