Boil the eggs. Remove the shells, and cut each one into four round slices. Place the meat, grated onion, bread (soaked and squeezed), the grated cheese, salt and pepper into a bowl. Knead well. Take a piece of meat, the size of a small egg and flatten it. Place an egg slice in the center, and cover it with the meat forming a ball. Do the same with the rest of the meat. Fry the kofte in butter. Serve with fried potatoes.