I used the full amount of jalapenos and WOW that's spicy! I do like spicy foods so I find it tolerable. With the lack of spices in this recipe I thought it would be bland. I think the dish is only as good as the salsa you use since that is where the bulk of flavor is coming from.
I added a can of drained/rinsed black beans to up the protein and fiber and make it a main dish. A handful of frozen corn would be a nice addition too. We like to eat this casserole with a side of tortilla chips. It is like a healthy version of nachos!