This dish turned out fantastic. I followed the advice of some of the other reviewers. These are the changes I made:
1 cup of rice instead of 1/2 cup
3 cups of milk instead of 2
added celery and fresh garlic with the leeks
cooked chicken in skillet with olive oil, garlic salt, pepper
added rosemary, parsley, and garlic salt
used broccoli instead of green beans
This dish had tons of flavor and made a lot of food. Looking forward to the leftovers!