Squid and prawns with chilli and marjoram

I love to serve this along with plain, boiled Italian black rice, which I advise for its drama as well as its sauce-soaking capacity. But if you want to stretch the amounts below to feed more people, then cook a packet of spaghetti and toss the lemony chilli-flecked seafood through it, making sure you use a little pasta cooking water to help the sauce emulsify.