It seems there are several recipes for this on Food.com but this is the way we serve it in this Texas household. It's delicious served with condiments or straight out of the oven (the way the guys in my family like it!)
Brown beef with onions then drain. Add taco seasoning, tomato sauce, corn, olive; mix well. Pour into casserole dish. Mix cornbread with milk and egg. Pour over meat. Bake at 400 degrees for 10 minutes. Top with cheese and jalapenos. Bake another 10 minutes.