1 pkg. flour tortillas, torn into wedges
1 lb. hamburger meat, browned & drained
1 med. can Ranch-style beans (or plain pinto beans)
1 med. onion, chopped
2 cups shredded cheese (Longhorn, Colby, or combined w/Monteray Jack)
1 can Rotel diced tomatoes w/peppers (mild or hot, as you prefer)
1 can mushroom soup
Spray 2 qt. casserole dish with Pam. Line with torn up tortillas. Then layer, in this order: half of meat, beans, onion, cheese. Repeat layers, beginning with tortillas.
In a separate bowl, mix Rotel & mushroom soup. Pour over the layers in casserole. This will look repulsive, thus the name. You may want to add some grated cheese on top, just to make it look better.
Do not stir.
Bake 45 minutes to 1 hour at 350′ covered. Should be bubbly and hot through & through.