I bet you could cook that in a crock pot. Certainly in a Nesco roaster.
Especially the roaster because I like a little brown on top. I have only made single servings of my twice baked rice because I usually make that for me in self-defense when I make a potato dish for Lloyd or the family. It's really easy to mix up with a little bit of leftover rice. And I just mix it up and put it in a small cereal bowl to bake/brown.