Duck and pomegranate salad with hoisin vinaigrette

Ingredients

• 4 duck breasts
• 1 red onion, peeled, halved and finely sliced
• 2 spring onions, finely sliced
• 1 Lebanese cucumber, finely sliced
• 2 cups loosely packedrocket leaves
• 1 bunch watercress, picked and thick stalks discarded
• 1 pomegranate, seeds only (see tip*)
• 1 cup mint leaves
• 1 small red chilli, sliced