Begin by bringing a large pot of salted water to a boil. Add the fresh tortellini and cook according to the package instructions, usually around 3-5 minutes, until they are al dente. Once cooked, drain them in a colander and set aside.
In a large skillet, heat the olive oil over medium heat. Once the oil is shimmering, add the minced garlic and sauté for about 1 minute, stirring frequently until the garlic becomes fragrant but not browned.
Carefully pour in the heavy cream, stirring to combine, and bring the mixture to a gentle simmer. Add the roughly chopped spinach to the skillet and cook for 2-3 minutes, stirring occasionally, until the spinach has fully wilted and brightened in color.
Stir in the Italian seasoning, and then season with salt and pepper according to your taste preference. If you enjoy a bit of heat, sprinkle in some red pepper flakes. Allow the sauce to simmer for an additional 2 minutes, stirring from time to time.
Carefully add the drained tortellini to the creamy spinach sauce in the skillet. Gently toss the pasta to coat it evenly. Gradually sprinkle in the grated Parmesan cheese, allowing it to melt and incorporate smoothly into the sauce.
If the sauce appears too thick, add a tablespoon or two of the reserved pasta water to achieve your desired consistency. Taste the dish and make any necessary adjustments to the seasoning, adding more salt, pepper, or red pepper flakes if desired.
Use a large spoon to transfer the creamy tortellini to individual serving plates or a communal serving dish. Finish with a garnish of fresh basil leaves and, if you like, an extra sprinkle of grated Parmesan cheese for added richness.
Notes
Feel free to adjust the seasoning and add more red pepper flakes for extra heat.