Fiesta flavors make this easy casserole a delicious dinner. If using cooked ground meat, the prep for South of the Border Casserole is less than 10 minutes.
Brown meat, remove from heat, and stir in salsa. Mix green onions, corn, and olives.
In a large casserole dish, layer all the beans, ½ the meat mixture, all the vegetables, then the remaining meat mixture. Top with cheese and bake covered for 45 minutes at 350°F.