Follow these simple steps to create your Creamy Pesto Tortellini Soup:

1. Heat Olive Oil: In a large pot, heat the olive oil over medium heat.
2. Sauté Onion and Garlic: Add the diced onion and minced garlic. Sauté until the onion is translucent, about 3-4 minutes.
3. Add Broth: Pour in the vegetable or chicken broth and bring to a simmer.
4. Stir in Cream and Pesto: Once simmering, add the heavy cream and pesto. Stir well to combine.
5. Add Tortellini: Bring the mixture back to a gentle boil, then add the fresh tortellini. Cook according to the package instructions (usually 3-5 minutes).
6. Add Spinach: In the last minute of cooking, stir in the baby spinach until wilted.
7. Season: Taste and adjust seasoning with salt and pepper as needed.
8. Serve: Ladle the soup into bowls and top with grated Parmesan cheese and fresh basil if desired.

These steps will guide you in creating this incredible soup effortlessly.