Prepare the Chicken: Season the chicken breasts with seasoned salt and pepper, then place them in the bottom of a lightly greased 6-quart slow cooker.
Add the Stuffing: Sprinkle the dry stuffing mix evenly over the chicken.
Mix the Sauce: In a medium bowl, whisk together sour cream, mayonnaise, condensed soup, and water until smooth. Pour the mixture evenly over the stuffing.
Add the Green Beans: Scatter the frozen green beans over the top and season with additional salt and pepper, if desired.
Cook: Cover and cook on HIGH for 3 to 4 ½ hours or on LOW for about 6 hours, until the chicken is tender and fully cooked.
Serve & Enjoy: Stir lightly before serving and enjoy this creamy, delicious meal straight from the slow cooker!