The first time you make this recipe, keep an eye on it about an hour close to finish so you can make sure the green beans and potatoes are not overcooking (according to how you like them). If you're cooking on high, for example, start checking on it about 3 hours in. If cooking on low, I found that my green beans were done at 5 hours, so you make want to start checking on your food at about 4 hours into the cook time.