Braised oxtail, celeriac, espuma mash and Douglas fir

Preheat the oven to 110°C/gas mark 1/4

To begin, caramelise the oxtail in a hot pan until nicely browned all over. Place the Douglas fir in a deep roasting tray and lay a muslin cloth over the top

Place the oxtail on the cloth and arrange the carrots, onion, celery and garlic around the sides. Add the red wine, cover with water and cover the tray in foil. Place in the oven for 10 hours

Once cooked, pass the liquid through a sieve and pick the meat from the bones. Skim off all the fat from the liquid and reduce to a sauce consistency. Add a small amount of sauce back to the meat to moisten it and season with salt

Lay a sheet of sturdy cling film on a work surface and lay the oxtail meat down the centre in a sausage shape. Wrap tightly in the cling film to form a ballotine and tie the ends to seal. Place in the fridge to set

Place the potatoes in a pan, cover with water and bring to the boil. Reduce the heat and simmer until cooked

Drain the water, mash until smooth then place the potatoes, cream and milk in a pan. Bring to the boil then transfer to a blender with the butter and blitz until smooth. Season to taste, place in a siphon gun and charge with 2 N2O cartridges

Finely slice the celeriac 8 times on a mandoline and cut out 8 circles with a round cutter. Add the white wine vinegar, sugar and white wine to a pan, bring to the boil then pour over the celeriac

Cut eight 2.5x5cm triangles from the celeriac and boil in salted water until cooked

Blend 100g of the celeriac with the potatoes in a blender with water until you reach a crumb consistency, then wash using a really fine strainer under running cold water to remove excess starch. Dry completely using a cloth

Place the vegetable oil in a large deep pan and warm to 190°C. Slowly whisk in the dried celeriac and potato, cook until golden then strain off the oil and dry the crumb on a cloth. Season with salt

Blanch the kale in boiling salted water then finish in a hot pan with the butter

Preheat the oven to 160°C/gas mark 3

To serve, cut 4 portions from the oxtail ballotine and colour the cut-sides in a pan, still wrapped in the cling film to keep the shape. Warm through in the oven, then remove the cling film

Pipe some espuma mash on each plate then add the red kale. Place the oxtail on the top

Caramelise the celeriac triangles in a pan with oil and butter and divide between the plates with the pickled celeriac. Add the Douglas fir sauce and finish with the celeriac crumb