In a large saucepan, melt butter over medium heat. Stir in flour until smooth. Gradually add broth; bring to a boil. Cook and stir for 1 minute or until thickened. Carefully add meat and parsley; cook and stir for 2-5 minutes or until meat is no longer pink. Stir in the salt, nutmeg and pepper. Transfer to a bowl; refrigerate for 3-4 hours or until chilled., Place bread crumbs in a small shallow bowl. In another bowl, whisk the eggs, milk and oil. Drop meat mixture by tablespoonfuls into bread crumbs; shape into balls. Dip meatballs in egg mixture, then coat again with crumbs. In an electric skillet or deep fryer, heat oil to 375degrees., Fry meatballs, a few at a time, for 2-4 minutes or until golden brown on all sides. Drain on paper towels. Serve hot with mustard if desired.