500g/1lb 2oz leeks, thinly sliced
8 large potatoes (or, if the potatoes are smaller, about 1.2kg/2lb 10oz in total)
4 baked potatoes (see above), cut into small pieces
salt and ground black pepper
2 tsp olive oil
2 tsp vegetable oil
100驳/3陆辞锄 cheddar, grated
6 free-range eggs, beaten