Poached sea trout with wasabi and watercress sauce

By Matt Tebbutt From Saturday Kitchen Ingredients For the stock 2 shallots, sliced 1–2 fennel bulbs 1 tsp peppercorns 1 tsp coriander seeds 150ml/5fl oz vermouth 1 small knob fresh root ginger 1 bay leaf few dill sprigs 1 tbsp fresh parsley stalks salt, to taste For …