Heat oven to 350°F; spray 15x10-inch pan with sides with cooking spray.
In 4-quart bowl, beat eggs. Add contents of seasoning and stuffing packets, meatloaf mixture, apple, celery, milk and Worcestershire sauce to eggs; stir until thoroughly combined. Shape mixture in to 6 (4x3 inch) loaves; place in sprayed pan.
Bake at 350°F for 30-40 minutes or until thoroughly cooked in center. Let meat loaves stand while making gravy.
Remove meat loaves from pan; place on large serving platter. Garnish with parsley sprigs.