Mackerel with barbecued gazpacho consommé and basil

Prepare the gazpacho at least one day before you plan on serving the dish. Preheat a barbecue

Cut the tomatoes, onion, pepper and cucumber into 3cm pieces and cook on the barbecue (using a plancha or tray for them if the pieces are too small to sit on the grate) until well coloured and beginning to char. Set aside to cool

Add the vegetables to a blender with the remaining ingredients, blitz until smooth, then transfer to a muslin bag suspended over a bowl or jug. Leave the mixture to pass slowly through the cloth overnight in the fridge

The next day, transfer the collected liquid to a suitable container and freeze into a block. Once frozen, place in muslin cloth once more and allow the liquid to drip through, until only colourless ice is left. The defrosted liquid should be very clear and have a very strong flavour. Season to taste

To make the tomato petals, blanch the tomatoes briefly in boiling water, then drain and chill immediately in iced water. Peel away the skins and reserve them for the tomato powder. Cut the tomatoes neatly into quarters and remove the seeds and core. Reserve the quarters and seeds separately in the fridge for the garnish

Take the reserved tomato skins and spread out on a dehydrator mat. Allow to dehydrate at 50°C until completely crisp (about 12 hours)

Meanwhile, make the basil oil. Blitz the basil leaves and oil together in a blender until smooth, then transfer the blended pulp to a saucepan and cook over a high heat for 1-2 minutes, to evaporate any water. Immediately pass through a muslin cloth into a bowl set over ice

Preheat an oven to 170°C/gas mark 3.5

To make the feuille de brick tubes, place one sheet of the pastry flat on a chopping board, brush with egg white and stick a second sheet on top. Cut into 8x4cm rectangles, then repeat this step with the remaining two sheets until you have a total of 10 rectangles

Wrap each pastry rectangle around a lightly oiled metal tube or pipe (roughly 1-1.5cm in diameter) and bake in the oven until golden (around 8 minutes). Allow to cool, then very carefully remove the pastry tubes as they will be quite fragile. Set aside in an airtight container once cool

To prepare the mackerel, remove any excess fat from each fillet, then rinse under cold water. Using a pair of bone tweezers, remove the thin membrane-like skin on the outside of the fillets. Removing this should leave the coloured, patterned part of the skin still attached to the flesh

Pin-bone each fillet carefully, then cut the fillets into 6mm-wide slices using a very sharp knife, reserving the tail piece and any offcuts to make a tartare for the pastry tubes. Set aside in the fridge

For the tartare, cut 10 of the reserved tomato petals into a small brunoise. Take the reserved mackerel trimmings and cut to the same size. Mix the two together and season with salt and olive oil

When the tomato skins are fully dehydrated, blitz into a powder using a spice grinder

To plate, lay 6 mackerel slices (seasoned with salt and Espelette pepper) flat onto the base of each bowl, and fill in the gaps with the reserved tomato seeds and basil oil. Separate the purple basil julienne into individual strands and arrange randomly on the plate around the mackerel. Pour in the strained gazpacho liquid and season the mackerel with Espelette pepper and a little salt. To finish, fill each pastry tube with a portion of the tartare and dust with the tomato powder. Serve immediately