Creating this Crockpot Tortellini Soup is as simple as following these steps:

1. Sauté Aromatics: In a skillet over medium heat, add olive oil. Sauté the diced onion until translucent, about 5 minutes. Add minced garlic and cook for another minute.
2. Combine Ingredients: In the crockpot, add the sautéed onions and garlic, carrots, celery, red bell pepper, vegetable broth, diced tomatoes, Italian seasoning, salt, and pepper. Stir well to combine.
3. Cook: Cover the crockpot and set to low for 4 hours or high for 2 hours, allowing all the flavors to meld and the vegetables to become tender.
4. Add Tortellini: Approximately 30 minutes before serving, stir in the cheese tortellini. Cover and let it cook until the tortellini is tender.
5. Finish with Spinach: About 5 minutes before serving, add fresh spinach to the pot and stir until wilted. For added creaminess, you can include heavy cream at this stage.
6. Adjust Seasoning: Taste the soup and adjust salt and pepper as desired.
7. Serve: Ladle the soup into bowls and top with grated Parmesan cheese and fresh herbs if desired.

By following these simple guidelines, you’ll end up with a deliciously comforting meal that can easily become a family favorite.