In a large bowl, combine the beef, pork, breadcrumbs, milk, egg, onion, salt, pepper and nutmeg. Shape the mixture into 1-inch balls. Place the meatballs on an rimmed sheet pan. Bake, uncovered, for about 30 minutes (until light brown and cooked through). Remove the meatballs to a serving dish; keep warm.
Place 3 tablespoons of the meatball drippings into a saucepan. If you don't have enough drippings, add some butter in to replace what's missing. Whisk in the flour. Cook over low heat, stirring constantly, until the mixture is smooth and bubbly; remove from heat. Whisk in the half and half, water, bouillon and salt. Heat to boiling, stirring constantly. Boil and stir for 1 minute. Reduce to simmer and continue to heat and stir until the sauce has thickened.
Serve meatballs on their own, over egg noodles or alongside boiled potatoes. Garnish with parsley, if desired.
Notes
Nutritional information is for meatballs and sauce only (count any noodles or potatoes as extra).