Cook tortellini according to package instructions; drain and set aside.
Season chicken cubes with salt and pepper.
Heat olive oil in a large skillet over medium-high heat. Add seasoned chicken, cook stirring occasionally for 5-7 minutes or until brown and cooked through. Transfer the cooked chicken to a plate and loosely cover with foil to keep warm.
Add the chicken broth, heavy cream, garlic, Italian seasoning, and half of the Parmesan cheese to the skillet. Whisk over medium-high heat until it starts to thicken, about 3-4 minutes.
Stir in spinach and sundried tomatoes; simmer until the spinach starts to wilt, about 2-3 minutes.
Stir in cooked chicken and tortellini, top with remaining Parmesan cheese. Serve and enjoy!