Neil Perry’s potato and cabbage gratin

1.For braised cabbage, place cabbage in a colander in a large bowl and scatter with 1 tbsp sea salt. Stand for 1 hour to drain and discard liquid. Heat olive oil in a heavy-based saucepan over medium heat, add onion, garlic and a pinch of sea salt, cook for 5 minutes or until soft. Add cabbage, wine, vinegar and sugar. Bring to boil, reduce heat and simmer for 1 hour or until liquid is almost evaporated. Season to taste with sea salt and freshly ground white pepper. Cool.

2.Preheat oven to 150C. Spoon cabbage into a 1 litre-capacity gratin dish, spread evenly to cover base and scatter with Gruyère. Using a mandolin, slice potatoes lengthways into 2mm-thick slices. Arrange potatoes over cabbage, overlapping each slice by half until cabbage is covered, and season to taste. Cover with another layer of potatoes. Pour over cream, allowing to seep between layers. Bake for 40 minutes or until the potatoes are tender. Remove, scatter with parmesan and breadcrumbs and return to oven. Bake for another 5-10 minutes or until golden. Serve as a side with grilled meats or fish.