2 garlic cloves, finely diced
500g/1lb 2oz leeks, washed, trimmed and sliced
1 potato, peeled and cut into 1cm/陆in cubes
1 shallot, finely diced
3 fresh thyme sprigs, leaves only
sea salt and freshly ground black pepper
1 tbsp rapeseed oil
125驳/4陆辞锄 butter
250ml/9fl oz double cream
50驳/1戮辞锄 驳谤耻测猫谤别, finely grated
4 x 250g/9oz good-quality rump steaks
3 brioche slices, cut into 1cm/陆in cubes
100ml/3陆fl oz white wine