I found it to be a little bit bland but overall the dish was not to bad. The previous review was correct, you can taste the flour a little.
A pretty dish, with the greens of the chayote, parsley and scallions. I sliced the chayote before cooking it, which lets it cook a little faster and in less water. They do need to be well-drained, so that the dish doesn't end up watery. The sauce has a nice body, and the sour cream adds some dairy feel to the consistency. The taste of the flour is noticeable, but this may be a good tradeoff for the amount of fat in a traditional cream sauce.