Cut potatoes into bite size pieces and place into 1/3 of a 9X13 baking dish. Depending on size of chicken, you may want to slice them into smaller pieces. I had 2 large chicken breasts that were rather thick. So I sliced them in half down the middle to make them thinner (so much easier than pounding them out), then I cut them again in half to make two smaller pieces from each half. So each large breast makes four smaller pieces. Place the chicken in the middle third of your baking dish. Fill up the remaining third of your baking dish with the green beans. Salt and pepper everything. Sprinkle entire dish evenly with Ranch Seasoning. Pour melted butter over all the food. Cover with foil and bake at 350 degrees for 1 hour.