preparation
Pour warmed milk over stale bread. Peel onions, chop finely and sweat in butter. Cut cheese into small cubes and add to bread along with onions. Then mix well with eggs, leek, oil and salt and knead into a firm dough. Form dumplings with wet hands and boil in plenty of simmering salted water for 8-10 minutes. Take out dumplings, strain, and sprinkle with parmesan. Finally, pour over brown butter, scatter with chives and serve.