Heat the olive oil in a large soup pot or Dutch oven over medium-high heat. Add the chicken and 1 teaspoon of Italian Seasoning, salt and pepper to taste, and cook until browned on all sides, about 4-5 minutes.
1 teaspoon olive oil, 1- 1 ½ pounds boneless, skinless chicken breasts or thighs, 2 teaspoons Italian Seasoning, salt and pepper to taste
In the same pot, add the onions, carrots, celery, sundried tomatoes, and garlic and cook until translucent, about 3-4 minutes.
½ cup diced carrots, ½ cup diced celery, ½ cup diced onions, ¼ cup diced sundried tomatoes, 3 garlic cloves
Sprinkle the flour throughout and stir well to combine. Add the flour in stages to avoid excess drying. If you plan to add tomato paste, add it here and stir.
¼ cup flour, 2 tablespoons tomato paste
Gradually whisk in the chicken broth and stir repeatedly, ensuring there are no lumps. Deglaze the bottom of the pan using your spoon.
6-8 cups chicken broth
Bring the mixture to a rolling boil and add in the pasta and 1 teaspoon of Italian seasoning, salt, and pepper to taste. Cover the pot with the lid and lower the heat to low to let the soup simmer for about 20 minutes, or until the chicken is cooked through and tender and the pasta is al dente. Alternatively, you can boil the pasta separately, and add it at the end.
6 oz pasta
Open the pot and stir in the heavy cream, spinach, and grated Parmesan cheese, and let the soup simmer for an additional 5 minutes.
1 cup heavy whipping cream, ½-1 cup grated parmesan reggiano cheese, 2 ½-3 cups fresh spinach
Taste and adjust the seasoning with salt and spices if needed.