In a large saute pan over medium high heat, add oil, onions and garlic. Cook for three minutes then add ground beef, cumin and chili powder. Cook until no longer pink and add beans, tomato puree and one can of green chilies. Cook another 3 minutes then transfer contents to a 13x9 baking dish.
In a bowl, prep corn bread mix as directed on package. Add second can of green chilies, half of cheese and half of cilantro.
Spread corn bread mix over top of beef mixture in baking dish. Sprinkle with remaining cheese and half of remaining cilantro. Put in oven for 30 minutes.
Serve in a shallow bowl with dollop of sour cream and cilantro.