Mustard Meatballs

Ingredients

• 500g ground beef
• 1/2 cup bread crumbs
• 1/4 cup milk
• 1/4 cup finely chopped onion
• 2 cloves garlic, minced
• 1/4 cup chopped parsley
• 1 teaspoon salt
• 1/2 teaspoon black pepper
• 2 tablespoons Dijon mustard
• 1 cup beef broth
• 2 tablespoons flour
• 2 tablespoons butter