I really liked this! I made it pretty close to the recipe, only subbing dark meat for the chicken added. BTW, that's a plus - good use for leftover chicken.
It's not really omplicated to do, and I minimized that by buying already chopped onions and shredded cheese. The other thing is that I 'tempered' the addition of the cornstarch by scooping off some of the soup, then mixing the cornstarch into that, then adding back in. (Not sure it was necessary.) I would definitely add the sour cream and fresh cilantro at the end - yum! I appreciate too that the sodium is nowhere near off-the-charts, unusual for a good soup. Definitely will make again!