Seared turbot with celeriac, brown shrimp, mussels and shellfish velouté

For the velouté, add the butter to a medium saucepan and place over a medium heat. Once the butter is foaming, add the shallots, fennel and garlic and sweat until soft with no colour - then add the mushrooms. Continue to cook until the mushrooms release all their moisture and the pan is almost dry

Add the white wine and vermouth and reduce by half. Pour in the shellfish stock and reduce by half again. Then, add the double cream, parsley and thyme

Bring to a simmer. Adjust the seasoning accordingly and remove from the heat, adding the tarragon to infuse as it cools. Once completely cool, season to taste, pass through a fine strainer, cover and store in the fridge until required

For the purée, add the diced celeriac, nutmeg and a pinch of salt to a medium saucepan and cover with the cream and milk. Bring to the boil and then reduce to a gentle simmer, being careful not to let it boil over

Continue to cook for 10-15 minutes until soft and tender. Remove from the heat, strain off the liquid and reserve. Add the celeriac to a blender with a small amount of the liquid and blend until smooth and thick. Allow to cool and store in a suitable container until required

To prepare the kale, remove the leaves from the stem, tear into bite-size pieces and submerge in salted, boiling water for 2 minutes, then remove and refresh in ice cold water. Once cool, remove from the water and squeeze as much of the liquid out as possible

Add the double cream to a pan with the nutmeg and minced garlic. Bring to the boil and reduce for 2-3 minutes. Add salt to taste before adding the kale. Cook for a further 2 minutes, remove, cool and set aside the in the fridge until required

To cook the mussels, add a small amount of rapeseed oil to a medium saucepan and place over a medium-high heat. Add the shallots, celery and fennel and sweat for a couple of minutes until soft but not browned

Stir in the mussels, wine and vermouth, cover with a lid and cook for 2-3 minutes. Remove the mussels from the pan and strain and reserve the remaining liquid

Place the liquid back on the heat, adding the thyme, parsley and tarragon, and bring to a simmer. Reduce by a quarter, then remove from the heat and allow to cool. Remove the mussels from the shell and store in the reduced liquid. Refrigerate until required

To prepare the garnish, remove most of the root from the baby leek leaving a small amount intact to hold it together. Use a small knife to make an incision lengthways from the centre to the end of the green tip

Add the leeks to a pot of salted, boiling water and cook for 1 1/2 - 2 minutes. Remove with a pair of tongs and set aside. Add the Romanesco florets to the same pot of water and cook for 2 minutes, strain and add to the tray of leeks

Remove the turbot from the fridge 20 minutes prior to cooking. Add just enough rapeseed oil to cover the base of a large, non-stick frying pan and place over a high heat. Season the fish with salt and add to the hot pan. Cook for 3-4 minutes until golden

Meanwhile, use 4 separate pots to warm the purée, kale, mussels and velouté until steaming hot. Add the 20g of butter to a small frying pan and once foaming toss the baby leeks, Romanesco and a pinch of salt in the pan to heat through

To finish the turbot, reduce the heat, add the brown shrimp, butter and lemon juice and turn each fillet over. Use a spoon to baste the fish in the pan juices

Just before serving, use a stick blender to blitz the velouté into a foam

To serve, arrange a bed of kale in the centre of each plate. Place the fish on top of the kale. Add the purée, mussels, leeks and Romanesco to each plate and spoon the foam over each element. Garnish with the leaves of wood sorrel and serve immediately