Step 1

Cook the peas in a large pan of boiling salted water for about 3 mins (or 1 min if frozen). Drain and run under cold water to stop them cooking. Whisk the dressing ingredients together with some seasoning until emulsified.

Step 2

Mix the ham hock with the peas, parsley and dressing in a large bowl. Transfer the salad to a platter or spoon onto individual plates. Scatter over the spring onions and watercress just before serving.