You can use leftover roasted chicken, rotisserie chicken or other purchased cooked chicken. I cook the chicken in foil packets in the toaster oven at 400 degrees for about 20 minutes - I think this gives you moister chicken than if you cook it on the stove. Cut the chicken breast into strips, sprinkle with seasoning - I use Mrs. Dash's Garlic and Herb because it has no sodium. Place the chicken in the middle of the aluminum foil and fold the edges together to make a packet. Reserve the juices to add to the shredded/chopped chicken.