Preheat your oven to 400°F (200°C).
In a skillet, sauté the diced onion until translucent.
Add the ground meat and cook until browned.
Stir in the black beans, corn, diced tomatoes, chili powder, cumin, salt, and pepper.
In a bowl, mix cornmeal, milk, and eggs until smooth.
Grease a pie dish and pour half of the cornmeal mixture into the bottom.
Layer the meat mixture over the cornmeal base.
Pour the remaining cornmeal mixture on top.
Sprinkle shredded cheese evenly over the top.
Bake for 30-35 minutes or until golden brown.