Mix the cream of chicken soup, sour cream, stuffing, and ½ cup of chicken broth in a large bowl. Set aside.
Melt the butter in a large skillet and saute the onions and celery until the onions are translucent about 3 minutes. Set aside. Using the same skillet, cook the sausage until fully cooked, crumbling it as it cooks. Set aside.
Season the chicken breasts with salt, pepper, mustard powder, and Italian seasoning.
Place the chicken breasts in the bottom of the crock pot, spoon the stuffing mixture over the chicken, the green beans over the stuffing, followed by the cooked Italian sausage, sauteed onion and celery, and topped with the dried cranberries. Pour the remaining ½ cup chicken broth over all the ingredients and cook on high for 4 hours, or on low for 7.