I substituted plain yogurt for the sour cream and it was perfection. Bumped up the health-factor a notch without sacrificing the flavor.

I found this recipe because I was looking for something to combine the ingredients I had on hand, one being left-over brown rice. That being said, I obviously substituted the cooked rice, and I think I added significantly more than the recipe would have called for, maybe 2 cups I'm guessing. As other reviewers noted, it takes longer to cook; even at 375 degrees I had it in at least an hour and a half before the potatoes and carrots were done. I also added 1 tbl. crushed garlic and miscelaneous herbs like oregano and sage. The taste was delicious and even my little guys who aren't keen on casserole-type dishes ate a plate full. I will definitely make this one again, but will plan to start it much earlier next time!