INGREDIENTS
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1 lb (1.3 kg) 'old' potatoes, such as Golden Wonders or Kerr’s Pink
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1 lb Savoy, spring cabbage, or kale
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½ stick (50 g / 2 oz) salted Irish butter
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Generous 1 cup (250 ml / 9fl oz) whole milk
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25 (1 oz) spring onion or scallions, finely sliced (optional)
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Sea salt and freshly ground black pepper