Sardines with watercress salad

Method

1. Drain the sardines, reserving the oil (see tip). Make a dressing by whisking 3 tbsp of the oil with the lime zest and juice and some salt and pepper to taste. Set aside.
2. Toss the salad leaves with the radishes and half the dressing. Divide among
   4 plates, top with slices of avocado and arrange the sardines on top. Drizzle with the remaining dressing and serve with lime wedges for squeezing.