Put the chickpeas into a large bowl (remember that they will double in size) and cover with plenty of hot water and an equal amount of sparkling water (this helps them to hydrate more quickly). The volume of water should be about four times the volume of the chickpeas.
The next day, drain the chickpeas and put them into a pan with fresh cold water, the bay leaf and the onion. Put on a medium heat and bring to the boil, then lower the heat and cook until they are nice and soft. Drain and set aside.
Cut the squid into rings, one finger thick. Put all the marinade ingredients into a bowl, add the squid and prawns and leave to marinate for a couple of hours.
Put a pan on a medium heat. When hot, add the marinated squid and let it caramelize for around a minute, then reduce the heat to low, add the prawns and fry for 30 seconds. Add the shallots and cook for a couple of minutes, until nice and soft, then add the drained chickpeas, stock, salt and pepper. Cook until slightly reduced and sauce-y, then stir together and serve, sprinkled with the parsley.