This Spanish-inspired stew is a great weeknight dinner, particularly if you are having a few friends over, because it feels a bit special while actually being effortless and easy. If you want to take that effortlessness to the next level, make the potato base in advance, then finish off with the spinach and prawns just before serving (I like to do as little cooking as possible in front of guests, leaving me free to chat and pour drinks). Serve with a peppery, lemon-dressed salad on the side and hunks of crusty bread to mop up the juices.
