- STEP 1
Cook the green beans in a small pan of boiling salted water for 3-4 mins, until just tender. Drain and refresh under cold running water. Transfer to a serving bowl, add the lettuce, trout and croutons.
- STEP 2
Whisk the oil with the mustard and lemon zest and juice. Season and drizzle over the salad. Gently toss to coat and serve straight away.