To your crock pot, add the boneless skinless chicken breast.
Add the chopped carrots, celery, and onion.
Sprinkle the seasonings and garlic over top.
Pour in the chicken broth, and cook 3-4 hours on high or 6-8 on low.
About an hour before cooking is completed, whisk together the heavy cream and cornstarch, and add to the crock pot.
Also add the gnocchi.
Just before serving, add the spinach and grated parmesan cheese.
Allow about 5 minutes for the cheese to melt and the spinach to soften.