"Slow-roasted, caramelized onions covered in a decadent bechamel sauce sprinkled with cheddar and bacon creates an unforgettable gratin...."
INGREDIENTS
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2 medium yellow onions, cored and quartered lengthwise
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2 tablespoons olive oil
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coarse salt and freshly ground black pepper, to taste
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2 tablespoons unsalted butter
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2 tablespoons flour
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1 + 1/2 cups heavy cream
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¼ cup dry white wine, optional
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a grate (or a pinch) or two of fresh nutmeg
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heaping 1/2 cup of sharp white cheddar
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2 slices bacon, cooked, crumbled