INGREDIENTS
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Kosher salt
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1 1/2 pounds fresh French green beans, ends trimmed
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4 tablespoons butter, divided
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2 tablespoons finely chopped Vidalia onion
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4 ounces baby portobello mushrooms, cleaned and finely chopped (about 2 tablespoons)
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2 tablespoons all-purpose flour
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1 cup (8 ounces) sour cream
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Freshly ground black pepper
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1 1/2 cups corn cereal (recommended: Corn Flakes)
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1/2 pound grated mozzarella cheese