Preheat your oven to 350°F (175°C).
In a large mixing bowl, combine the cornbread mix, creamed corn, and milk.
Add the eggs and mix until well combined.
Stir in the shredded cheese, bell peppers, onions, garlic powder, salt, and pepper.
Grease a 9x13 inch baking dish with cooking spray or butter.
Pour the mixture into the prepared baking dish, spreading it evenly.
Bake in the preheated oven for 30-35 minutes, or until the top is golden brown.
Check for doneness by inserting a toothpick; it should come out clean.
Remove from the oven and let it cool for a few minutes.
Serve warm, garnished with fresh herbs if desired.