INGREDIENTS
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2 whole garlic heads
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1/2 teaspoon olive oil
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1 pound spaghetti
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1/2 cup reserved pasta water
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1 stick (1/2 cup) butter
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2 tablespoons freshly grated Parmesan cheese
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2-3 tablespoons freshly chopped parsley, basil or combination of both
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1/2 teaspoon salt plus additional to taste
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1/4 teaspoon black pepper plus additional to taste
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1 tablepoon shaved Parmesan flakes for garnish, optional
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Pinch of red pepper flakes, optional