I've also had good success with the pot-in-pot method for small amounts of rice. For a cup of rice, I use a glass pyrex bowl. Back in this post, I also tried a small volume (~1/4 cup) of TJ's brown rice medley in a small Corningware dish. Both containers were placed in the pot uncovered and in both cases, I rinsed, but did not soak the rice, and used an equal volume of rice and water (plus 2 cups of water in the pot) and the same cooking times I use for larger volumes (for this brown rice, I use 23 minutes, manual, high pressure.)
Picture from the old post showing the 1/4 cup rice + water ready to go into the IP on the left and the 1 cup volume already cooked in the pyrex bowl on the right.
