"With all the richness of a traditional potato gratin, this vegetable rendition is just as satisfying, but it's healthier...."
INGREDIENTS
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3 slices white sandwich bread, torn into large pieces
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2 tablespoons grated Parmesan cheese
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3 tablespoons butter
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1/3 cup all-purpose flour
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2 cups milk
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1 head cauliflower (about 2 pounds), cored and cut into small florets
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Coarse salt and ground pepper
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4 ounces Gruyere cheese, grated (1 cup)