1 (8 ounce) package corn muffin mix (such as Jiffy®)
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1 (4 ounce) can diced green chiles
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1 (15.25 ounce) can whole kernel corn, with liquid
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1 (15.25 ounce) can creamed corn
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1 pint sour cream
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1 cup shredded Cheddar cheese
Instructions
Preheat the oven to 350 degrees F (175 degrees C). Grease a 9x12-inch baking pan.
Melt butter in a skillet over medium heat. Add onion, bell pepper, and pimento peppers and saute until tender, about 5 minutes.
Combine eggs, corn muffin mix, green chiles, whole corn, and creamed corn in a large bowl with the onion mixture. Stir together and pour into the prepared baking pan. Drop sour cream by the spoonful on top of the mixture; cover with Cheddar cheese.
Bake in the preheated oven until casserole is firm, about 45 minutes.