Jansson’s temptation

Fruit and vegetables

2 large onions, approx. 400g/14oz, thinly sliced
1.25kg/2lb 12oz potatoes, peeled and cut into narrow strips like French fries

Cooking ingredients

2 tsp sea salt flakes, plus ½ tsp (or 1 tsp fine sea salt, plus ¼ tsp)
black pepper
2–3 tbsp breadcrumbs (optional)

Dairy, eggs and chilled

60g/2¼oz butter, plus extra for greasing
300ml/½ pint full-fat milk
300ml/½ pint double cream

Meat, fish and poultry

2 x 125g tins Swedish ansjovis (sprats), drained, see recipe tip

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