Chicken Dressing Cerole..How do I cook the Chicken?

You could likely cook it a number of ways. One of the easier ways I would do it would be to poach it. You can simply poach in water, but it will be more flavorful if you poach it in chicken broth and seasonings. I would bring a saucepan full of a mix of broth and water (if you don't have broth, you can use water, but you might want to put some salt in it, maybe throw in a half of an onion, a garlic clove or two, a celery stalk...) to a boil and add the chicken . Once it's boiling again, reduce to a simmer and allow to cook for 20 minutes or so, until cooked through. Remove from broth/water and let cool for a bit. Then dice and use in your recipe.