Step 1

Toss the couscous, onion and ginger in a heatproof bowl. Stir in 200ml boiling water. Cover and stand for 5 minutes.

Step 2

Meanwhile, cook beans in boiling salted water for 3 minutes. Drain, refresh under cold water, then discard tough outer skins.

Step 3

Fluff couscous with a fork, then add beans, capsicum, avocado, dill and spring onion. Whisk together juice, oil and garlic, then toss with couscous. Scatter with nuts and serve with cress and lemon wedges.