Add oil to a pan on medium heat and add the chopped onions. Let slowly brown, 15-20 minutes.
Dice the bread rolls, put in a bowl and add tepid milk.
Add the onions, chopped parsely and eggs to the soaked bread and knead to a dough. If the dough is too dry, add a bit of milk, if its too soft, add some bread crumbs.
Use wet hands to form the round dumplings. If you don't cook them right away, add to a tupperware container and store until ready to cook.
Add a pot with salted water on the stove and bring to a boil. Reduce to medium heat, add the dumplings and let simmer for 25 minutes. They are done when the dumplings rise to the top.