Mexican Treat Casserole

2 lbs cooked hamburger
1 onion chopped
1 pint salsa
2 can chili beans
1 pint sour cream
1 box jiffy corn bread mix
1 egg
 2/3 C milk
grated cheese
Put hamburger and onion in casserole dish. Pour salsa and beans over top. Put grated cheese over top. Spread sour cream on top.
Mix corn bread mix, egg and milk. Pour over top of the sour cream. Bake at 350 degrees for 50 minutes.