Queen scallops with winter vegetables and parsley pesto

By Matt Tebbutt From Saturday Kitchen Ingredients For the queen scallops with winter vegetables 25g/1oz salted butter 4 oyster mushrooms, sliced ½ fennel bulb, cored and finely chopped 1 onion, diced 2 celery sticks, diced 1 leek, diced 300ml/10fl oz fish stock 8 queen scallops, …