You can swap the cream of mushroom soup for cream of chicken or cream of celery if that’s what you have on hand; each will give the dish a slightly different but still comforting flavor. If you’d like a bit more seasoning without adding new ingredients, grind in some black pepper from your table shaker or sprinkle on a little dried thyme or paprika if those live in your everyday spice rack. Boneless, skinless chicken thighs also work—reduce the cooking time by about 30 to 45 minutes so they don’t dry out. For a slightly richer broth, tuck a small knob of butter under the green beans before cooking. To make it more of a one-bowl meal, serve it over rice or noodles and pour all the juices from the slow cooker on top. Leftovers reheat well on the stovetop over low heat with a splash of water if needed to loosen the sauce.