Soak the bread crumbs in the milk; mix with the ground beef. Add the eggs, onion, garlic powder, salt, pepper, nutmeg, and mustard; mix throughly. Shape into 40-50 bite sized meatballs. Fry in the butter until brown on all sides. Mix the remaining ingredients in a separate pan or crockpot. Simmer until the sauce thickens. If necessary, add a little flour or cornstarch to give the sauce enough body to stick to the meatballs. Add cooked meatballs. Serve with toothpicks. Variations: As lower fat alternative bake meatballs at 350 degress for 20 minutes or for vegetarians, ground tofu may be used instead of the beef. Celebrations: Rights of Succession, Feast of Banners, Spring and Summer Festivals, Fire Festivals.