While the squash is sweating, simmer meatballs in your sauce over medium - low heat until the meatballs are heated through, 10 - 20 min. (curiouscuisiniere.com)
You will then add the meatballs back to the sauce and cook the chicken meatballs in the sauce for 15 minutes on low in a covered skillet. (whitneybond.com)
To serve with tomato sauce, drop meatballs in sauce pan with tomato sauce and heat through. (aggieskitchen.com)