Preheat oven to 400°F and spray a 9×13 pan or a 12-inch cast iron skillet.
Brown 1 lb ground meat, seasoned with salt and pepper, ¼ teaspoon garlic powder and 1 teaspoon cumin in a large skillet over medium heat. Drain if necessary.
In a medium mixing bowl, stir together the ⅓ cup milk, 1 egg, 14 oz can cream style corn, 8.5 oz box Jiffy corn muffin mix and 4 oz can chopped green chilies.
Spread corn muffin mixture into prepared pan and bake until just barely set, about 15 minutes.
Remove from the oven and spread browned meat over the cornbread mixture. Top with 2 cups enchilada sauce and then 1 cup shredded Colby jack cheese. Bake for another 15 minutes.
Serve with sour cream, cilantro, green onions and jalapeno slices.