Preparation In large saucepan, combine low-salt chicken broth, carrots, celery, onion, parsley stems, and reserved turkey neck, heart, and gizzard. Bring to boil. Reduce heat to very low; simmer gently until gizzard is tender, about 1 1/2 hours. Transfer neck, heart, and gizzard to plate. Strain stock into medium bowl and cool. If adding giblets to gravy, pull meat from turkey neck. Chop neck meat, heart, and gizzard. DO AHEAD: Cover stock and wrap giblets. Chill up to 3 days.
Preparation In large saucepan, combine low-salt chicken broth, carrots, celery, onion, parsley stems, and reserved turkey neck, heart, and gizzard. Bring to boil. Reduce heat to very low; simmer gently until gizzard is tender, about 1 1/2 hours. Transfer neck, heart, and gizzard to plate. Strain stock into medium bowl and cool. If adding giblets to gravy, pull meat from turkey neck. Chop neck meat, heart, and gizzard. DO AHEAD: Cover stock and wrap giblets. Chill up to 3 days.