Creating Tortellini Soup is straightforward if you follow these simple steps:

1. Heat Oil: In a large pot, heat the olive oil over medium heat.
2. Sauté Vegetables: Add the diced onion, garlic, carrots, and celery. Sauté for about 5 minutes until the vegetables are tender.
3. Add Broth and Tomatoes: Pour in the vegetable or chicken broth and add the diced tomatoes. Stir to combine.
4. Season the Soup: Sprinkle in the Italian seasoning, salt, and pepper. Let the mixture come to a simmer.
5. Cook Tortellini: Add the tortellini to the pot and cook according to package instructions, usually about 3-5 minutes.
6. Add Spinach: Stir in the fresh spinach leaves and cook for an additional 1-2 minutes until wilted.
7. Taste and Adjust: Taste the soup and adjust seasoning if needed.
8. Serve Hot: 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 Tortellini Soup effortlessly.