Green Salad

• 3 hearts of cos lettuce or 1 floppy lettuce, leaves separated, washed and dried

Put the lettuce in a bowl. To make the dressing, mix the vinegar with the mustard, then add a big pinch of salt and a healthy grind of pepper. Whisk in the oil, slowly, so it’s properly mixed, or just add and shake in a jam jar.

Carefully dress the salad, a few dribbles at a time, until each