This has been a weekly staple my whole life, the one recipe my mom cooked for the family really well. She would also take it to potlucks, and my little cousin begged for more helpings of the "chicken in the van". That is now the name we use for this dish. It is a little different than the standard Divan recipe, but try it- you'll love it. The tarragon, nutmeg and touch of cinnamon work beautifully, don't be afraid! The waterchestnuts, while neutral in flavor, give a great chrunch. Everyone who's tried this recipe has loved it...a good Midwesterny comfort-dish perfect for potlucks.