Season chicken breast with salt and pepper. Heat the oil from sun dried tomatoes in a large soup pot over medium high heat. Add the chicken and cook for 4-5 minutes, until golden brown and heated through. Transfer to a bowl or plate.
1 1/2 lbs chicken breasts, 1 teaspoon Kosher salt and pepper to taste, 1 (8-ounce) jar sun dried tomatoes
Turn the heat down to medium and add butter to melt. Add the onion and garlic and cook for 2-3 minutes to soft. Stir in the tomato paste, sun dried tomatoes, Italian seasoning, and red pepper flakes. Stir and cook until the tomato paste coats the onions and becomes slightly rich in color.
1 small yellow onion, 4 cloves garlic, 4 Tablespoons tomato paste, 1 (8-ounce) jar sun dried tomatoes, 2 teaspoon Italian seasoning, 1/2 teaspoon red pepper flakes
Pour in 6 cups of chicken broth and add the parmesan rind. Bring it to a boil over high heat then reduce the heat to low and simmer for 8-10 minutes.
6 cups chicken broth
Add the gnocchi to the soup and cook until tender, 3-4 minutes. The soup will be somewhat thick but the gnocchi should float to the top when it's cooked. Remove the parmesan rind if using (it will be mostly melted).
12-16 ounces gnocchi
Add the cooked chicken back to the soup along with the heavy cream, parmesan cheese, and spinach. Cook over medium-low until the spinach wilts and the cheese is melted. Taste and add more salt and pepper as needed. Adjust the consistency with more broth or cream as needed.
3/4 cup heavy cream, 1/4 cup parmesan cheese, 5 cups baby spinach