Heat the duck fat in a saucepan over a medium heat until it melts and its temperature reaches 60C/140F (use a cooks' thermometer to check this). Add the smoked salmon pieces and poach for 4-5 minutes. Remove from the pan with a slotted spoon and set aside to drain on kitchen paper.
For the salad, whisk the caster sugar, rice wine vinegar and water together in a bowl until well combined. Season, to taste, with salt and freshly ground black pepper.
To serve, mix the salad dressing, cucumber and mooli together in a bowl until well combined. Spoon some salad into the centre of each of 4 serving plates. Top each with a piece of poached smoked salmon and scatter over the red amaranth and coriander cress.
Type the ingredients you want to use, then click Go. For better results you can use quotation marks around phrases (e.g. "chicken breast"). Alternatively you can search by chef, programme, cuisine, diet, or dish (e.g. Lasagne).
James Martin takes a look back at some of his favourite recipes and best moments.