INGREDIENTS
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3 tablespoons butter, plus extra for casserole
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1/2 large onion, chopped
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1 jalapeno, chopped
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3 tablespoons all-purpose flour
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2 cups milk
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1 cup shredded Cheddar
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2 eggs, beaten
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1 (10-ounce) bag frozen corn
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Salt and freshly ground black pepper 1/4 cup bread crumbs 1/4 cup grated Parmesan