INGREDIENTS
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300ml (1 cup plus 2 1/2 tablespoons) cream (35 to 40 percent fat) (in U.S.: heavy cream)
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166ml (2/3 cup) milk
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1 medium garlic clove, peeled and crushed
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1kg potatoes (about six medium-large desiree potatoes)
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3/4 teaspoon salt, or to taste
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1/8 teaspoon ground white pepper, or to taste
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100g (1 cup, firmly packed) grated tasty cheddar cheese
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diced onion (optional)