Make cornbread batter per packaged instructions, set aside.
Preheat oven to 400° and grease 9x13 pan, set aside.
Cook ground beef in a large skillet over medium heat, until no longer pink.
If necessary, drain excess fat from pan.
Add onion and jalapeno to meat, if using. Cook about 5 minutes, stirring so nothing burns.
Mix canned green beans and corn into meat mixture. Cook to a simmer.
Pour taco sauce into pan and mix until well combined.
Remove pan from heat. Sprinkle cheese over meat mixture and stir until cheese starts to melt.
Pour meat mixture into 9x13 pan, spreading evenly.
Pour cornbread batter over meat mixture, spread evenly with spatula. If your mix makes a large amount of cornbread batter, divid the batter and use half for the meat. Pour the other half of the batter into a muffin tin and bake after the pie is done.
Bake 35-45 minutes until cornbread is cooked through. Test with the toothpick method.
Let pan cool 5-10 minutes before serving.
Enjoy!