Put the swordfish steaks on top and rub them around the pan. Turn them over, so they are all coated in oil and garlic, and add a little extra salt on top of each steak. Bake for about 15 minutes.
Add the mustard, cream, and any juice from the resting swordfish plate and cook, stirring often, for 1–2 minutes, until the ...
Fill a bowl with ice water. In a saucepan of salted boiling water, blanch the spinach until tender and bright green, 1 minute. Drain, then transfer to the ice bath. Drain the spinach and squeeze dry.