Add the onion, garlic, thyme, basil, oregano, paprika, salt, pepper, tomato paste, carrots, celery, and vegetable broth to the slow cooker. Stir to combine.
Cover and cook on low for 6 to 7 hours or on high for 3 hours, until the vegetables are tender.
Stir in the spinach, heavy cream, Parmesan cheese, and tortellini.
Continue cooking for about 15 minutes, until the tortellini is fully cooked.
Video
Notes
This soup freezes best without the tortellini added.
Add the pasta fresh when reheating for the best texture.
Half and half can replace the cream if needed.
Stir gently after adding dairy to keep the broth smooth.