Cook ziti noodles according to package directions.
While the pasta is cooking cook chicken if it's not already precooked.
SAUCE In a skillet on medium heat 1 tablespoon butter with a tablespoon flour then slowly whisk in the milk and add chicken flavor. simmer on low for a 3 minutes.
In a large bowl mix pasta, chicken and ham with sauce.
Layer that mixture in two portions in a 13x9 casserole dish adding half the bread crumbs, oregano and cheeses to each layer.
Bake at 350 degrees 20 minutes or until it's heated through fully (160 degrees on meat thermometer)