1. Preheat oven to 350°. In a large bowl, whisk together first four ingredients; stir in corn, 1-1/2 cups cheese and onion. Transfer to a greased 11×7-in. baking dish
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3. Toss bread crumbs with melted butter; distribute over casserole. Sprinkle with remaining cheese.
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5. Bake, uncovered, until golden brown and heated through, 35-45 minutes. Let stand 10 minutes before serving.
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Test Kitchen Tips

• Any leftover bread can be used to make the bread crumbs. Use an egg bread for a golden hue, whole grain bread for a heartier texture or sourdough for a hint of tang.
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• Try using finely chopped red onion or shallots to add a touch of color to the casserole.
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• For a sharper cheese flavor, use an aged Swiss.
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Editor’s Note

To make soft bread crumbs, tear bread into pieces and place in a food processor or blender.

Cover and pulse until crumbs form. One slice of bread yields 1/2 to 3/4 cup crumbs.