Quesadilla casserole Revised

I made this recipe last night but made some revisions that we really liked. Heres the new version.

1 lb ground beef
3 tablespoons taco seasoning, about 1 packet (I buy this at Costco because it is SO much cheaper than buying individual packets at the grocery store.
1 onion, diced into medium sized pieces
1 can (14.5 oz) tomato sauce
1/4 cup salsa
1 can black beans (didn't use it last night, but definitely want to- didn't have any)
1 cup frozen corn
2 cups of cooked white rice
8 flour tortillas
3 cups shredded cheese

1. Brown ground beef and onions with taco seasoning. Drain well.
2. Add in tomato sauce, salsa, black beans, and frozen corn. Let come to a boil and get nice and hot. Taste it now and see if it needs more seasoning, if so add some in. Stir in cooked white rice.
3. Take 1/2 cup of sauce, and put it into a greased 9 x 13 pan and spread around. Lay down 3 tortillas. Put half of the beef mixture on top. Then layer with cheese. Lay down 3 more tortillas and layer beef and cheese. Top with 2 tortillas and layer with more cheese. Bake in preheated 350 deg oven for about 15 minutes or until hot and bubbly. Let stand for 5 minutes before serving.