Parboil liver until tender, and then put through a food chopper. Mince onions very fine. Place four tablespoons of fat in a frying pan and add onions and liver. Cook gently until onions are tender and then lift and turn into a mixing bowl.
Add potatoes, salt, paprika, thyme, flour, and baking powder. Mix thoroughly and then add egg and potato water.
Work to a smooth well-blended mass and then rub your hands with salad oil and then form this mass into balls. Cook for twenty minutes in boiling salted water. Lift with a skimmer on a napkin to drain.