Onions peel, one finely dice. Knead minced meat, diced onion, breadcrumbs, egg yolk, salt and pepper. Shape 5-6 dumplings with moistened hands, dipping hands more often in water.
Bring a good 1 1⁄2 l water and 1 teaspoon salt to the boil in a shallow wide pot. Cut an onion in half and add the bay leaf. Add the dumplings to the water and simmer at very low heat for 15-20 minutes.
Lift out the dumplings with a skimmer and let them drain. Pour the meat stock through a fine sieve and measure for the sauce 3⁄8 l. Use the rest of the stock for other purposes, freeze if necessary.