If you're not using onions in your stuffing, what can you substitute to keep it moist?

An egg whipped with a little water. Often used.

Celery, carrots, fresh cranberries.

celery, and it's normal in stuffing/dressing. but you're going to need broth as well. Have you made your turkey stock for stuffing and gravy?

apples add moisture

Hi Stella! Maybe try leeks or shallots? Or even an onion bread if you still want the flavor.