(If frozen) Thaw overnight in fridge or in the morning in water (meal may not be 100% thawed but that is ok).
Dump contents of freezer bag into slow cooker and pour 4 cups broth and 2 cups water into slow cooker.
Cook on low 3-4 hours.
During the last 30 minutes of cook time add 5 oz spinach and 2 tbsp. apple cider vinegar.
Stir when finished, garnish with parmesan cheese and enjoy!