How to Make It
In a large saucepan, toast the coriander, fennel and cumin seeds over moderate heat until fragrant, about 1 minute. Transfer the seeds to a plate and let cool. Finely grind the spices and return them to the saucepan. Add the olive oil, onion, shallot, bell pepper, garlic, carrot and sherry vinegar and bring to a gentle simmer over moderately low heat. Cook until the bell pepper is crisp-tender, about 8 minutes. Add the thyme and saffron and season with salt. Let cool.
Put the crab and parsley in a large bowl and pour the escabèche mixture on top. Gently toss, being careful not to break up the crab. Refrigerate until chilled, at least 4 hours or overnight. Serve with crusty bread.