heat vinegar with 1 tsp of salt until lukewarm. remove
place 2 mackerel fillets in tight dish. cover with vinegar and let sit all day. drain and put to side.
Make dressing. Juice 2 pomegranates by squeezing them over a sieve into a bowl . Add lime juice, tequila, sesame oil and ginger.
Place fillets in half of the juice and leave for 30 mim. turn mid way.
take out the seeds from the last pomegranate.
plate up the cress and fennel. drain and pat the mackerel. slice the mackerel in thin slices. Place on top of fennel with pomegranate seeds lime zest and a drizzle of the dressing. finish with olive oil.