In a large mixing bowl add in your favorite Alfredo Sauce, grate parmesan cheese, chicken broth, chopped sun-dried tomatoes, 1/2 tsp dried basil, 1/2 tsp salt and 1/4 tsp. Whisk together until throughly combined, then set aside.
Add 1/4 chopped yellow onion, 3 cloves garlic minced and 2 tbsp olive oil to a large frying pan. Heat at medium heat for 2 minutes-- occasionally mixing.
While the garlic and onion is sautéing, season each side of your boneless skinless chicken breast with salt, pepper and dried basil.
Add the chicken breasts to the frying pan and sear the chicken breasts on each side for 3 minutes each. During the searing cover frying pan with fit lid or aluminum foil to seal in the heat.
While the chicken breasts are searing, grease the inside of your 4 qt crock pot. Then pour about 1/3 of the Alfredo mixture at the bottom of the Crock Pot.
Once each side of the chicken breasts have been seared add them on top of the 1/3 of the Alfredo mixture in the Crock Pot. All of the onion & garlic from the frying pan as well.
Then pour the rest of the Alfredo mixture on top of the chicken breasts and then turn on low for 3 1/2 hours.
At 3 1/2 hours, add in 2 cups of fresh spinach roughly chopped spinach. Fold in until incorporated.
Then take each chicken breast out and serve with fresh veggies! ( the chicken falls apart so easily because it is so perfectly tender. Therefore, take out cautiously)