First time making this, and it was a hit.
I did substitute quinoa for brown rice. I also substituted almond milk, but couldn't get sauce to thicken (also used rice flour -- I'm gluten free). I only had one pepper so I added some shaved brussel spouts. Had butcher make some turkey sausage using andouille seasoning. I didn't use all the cheese and forgot the jalepenos :-(.
I can definitely see making this again. I like the suggestions on roasting veggies first so they aren't so mushy. Also, my quinoa got burnt around edges on the second round of baking --- not sure it was necessary as there wasn't much liquid left anyway.