To dress the crab, cut the cucumber in half lengthways, remove the seeds and cut into small dice. De-seed and finely chop the chilli. Place the cucumber and chilli in a mixing bowl with the crab meat, crème fraîche, the zest and juice of 1 lime and half a bunch of chopped coriander. Mix and season with salt and pepper, and then cover and store in the fridge until needed.
For the salad,