INGREDIENTS
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6 medium potatoes (2 lb.), peeled, if desired, and thinly sliced (about 6 cups)
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1/2 cup chopped onion (1 medium)
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2 large garlic cloves, minced
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2 tablespoons olive oil or cooking oil
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1/4 cup all-purpose flour
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1 teaspoon salt
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1/4 teaspoon ground black pepper
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3 cups milk
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1 cup shredded Parmesan (4 oz.)