I mainly made this because I wanted something to eat with biscuits! It's pretty much like the inside of a chicken pot pie. It was a good way to get a lot of veggies without really thinking about it!
I used chicken thighs instead of chicken breast, omitted the onion (for a guest-otherwise I would have thrown more in there!), and used rosemary and thyme instead of sage (my sage was looking questionable.) The result was yummy, but I bet it would have been good as written, too. I made the rosemary buttermilk biscuits from my biscuits and gravy post to accompany the stew.
One last note- I never have any luck thickening things with flour! I'm partial to a cornstarch slurry.
Another winner from allrecipes.com! Thanks to Sal.
Potato Chicken Stew