Preheat your oven to 375°F and spray a large casserole dish with nonstick cooking spray.
Combine all ingredients (except shredded cheese) in the casserole dish. Mix well to ensure everything is evenly distributed and submerged in liquid.
Cover the dish with aluminum foil and bake at 375ºF for about 50 minutes.
Uncover the dish and sprinkle shredded cheese on top. Bake, uncovered, for an additional 10 minutes.
Allow the casserole to rest for 10 minutes before serving. Serve with Greek yogurt, additional shredded cheese, salsa, and green onions.