Mix all the ingredients except the hard-boiled eggs and the margarine. Put half the mixture into a well greased loaf pan, then put the whole hard-boiled eggs in a row down the middle of the meat and cover with the remaining meat mixture. Dab the top with margarine as desired: a lot if the meat is lean, very little if it is fat. Bake for 15 minutes in a 500° F. oven, then reduce the heat to 350° F. for about 45 minutes, until brown on top. Serve warm or cold in thick slices so the egg centers each piece.