Soak the matzos in boiling water, and when softened, drain and squeeze dry. Heat the fat in a skillet, add the onions, fry to a golden brown, then add the soaked matzos. Stir until it leaves the skillet clean, then add the seasonings. After it cools, add the egg and the matzo meal. Let stand in the refrigerator overnight. Use ice water on the hands to roll and shape into golf ball sized balls and cook in boiling salted water until done, about 30 minutes. Drain and place in pyrex dish and keep warm in low temp oven (with door open) until ready to serve. Cover with melted butter and chopped parsley.