I was searching to post this recipe and found it all alone and unreviewed for more than two years! This is very similar to a dish called Sonora Casserole served at I-10 Diner in San Antonio. My recipe has a few minor differences. It lists more chili powder (1 1/2 T), plus 1/4 t garlic powder, and has half the cheese sprinkled on top before baking for 20-30 minutes, then spread with sour cream and topped with green onions as listed above. My husband is not a vegetable lover but he really likes this. Could be a vegetarian main dish. Thanks, Millie, for posting!