Salisbury Steak Meatballs (Instant Pot, Stove Top, Slow Cooker)

I used all ground turkey and accidentally put all the mushrooms in the meatballs but turned out great! I prepped the meatballs ahead of time, baked them and then reheated in sauce for an easy weeknight meal.

Chill meatballs overnight or freeze partially so they keep shape. Brown in pan and then finish with sauce so it can thicken more. May need cornstarch and milk.