Mom's cream of chicken

Why I Love This Recipe
This is my favorite thing that my Mom makes. I changed it a little bit because we're trying to eat healthier so i substituted whole wheat flour and low-fat milk.
Ingredients You'll Need
Small whole chicken(i used two large bone in chicken breasts)
1/2-1 tsp Salt
1/4 tsp Pepper
1/2-1 tsp Poultry seasoning
3 Celery stalks
3 Carrots
1/2 cup Margarine
1/2 cup Flour
2 cups Milk
Rice or egg noodles (to serve w/ finished product)
Directions
Put Chicken Carrots and Celery in large pot.
Cover with water up to about an inch over the top of chicken.
add poultry seasoning, and salt and pepper to taste.
Cover and let boil until chicken is cooked through (up to about an hour and a half depending on the size of the chicken or chicken pieces)
remove chicken and vegi's from broth and cut into bite size peices removing skin and bones from chicken and set aside
take out 2 cups of broth and set aside
in a smaller pot (or same pot if you want)
melt the margarine at medium/low heat.
whisk in flour/tsp of salt,1/4 tsp of pepper mixture.
allow to bubble for a min or so (gets rid of the floury taste a little)
whisk in milk and broth about a 1/4 cup at a time.
turn up heat to medium and allow to boil stirring frequently
once it boils it will start to thicken.
once the thickness you would like add in pieces of chicken and vegi's.
serve over rice or egg noodles.