INGREDIENTS
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¼ cup butter
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¼ cup all-purpose flour
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½ teaspoon salt
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1 cup milk
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4 egg yolks
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1 cup shredded Cheddar cheese
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1 10-oz package frozen Brussels sprouts, cooked, drained, and finely chopped (about 2 cups) May use fresh, cooked Brussels Sprouts, of course - do not overcook
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4 egg whites