Creating the Texas Tamale Pie Casserole is straightforward if you follow these simple steps:

1. Preheat Oven: Preheat your oven to 350°F (175°C).
2. Cook the Beef: In a large skillet over medium heat, brown the ground beef along with the chopped onion and minced garlic. Cook until the meat is no longer pink, about 5-7 minutes.
3. Add Tomatoes: Stir in the tomato sauce, diced tomatoes, diced green chilies, chili powder, cumin, salt, and black pepper. Let the mixture simmer for about 5 minutes.
4. Mix in Corn: Add the corn kernels to the meat mixture and stir to combine.
5. Prepare Cornbread Mixture: In a separate bowl, combine the cornbread mix, milk, and egg until just mixed.
6. Layer the Casserole: In a 9×13-inch baking dish, spread the meat mixture evenly across the bottom.
7. Add Cornbread Topping: Pour the cornbread mixture over the meat layer, spreading it out evenly.
8. Bake: Place the baking dish in the preheated oven and bake for 30-35 minutes, or until the cornbread topping is golden brown.
9. Add Cheese: In the last 5 minutes of baking, sprinkle the shredded cheese over the top. Allow it to melt and get bubbly.
10. Cool and Serve: Remove the casserole from the oven and let it cool for a few minutes. Garnish with fresh cilantro before serving.

Following these steps will guide you in crafting this incredible casserole with ease.