Cut the veg into small cubes and add to a baking tray with the chickpeas. Drizzle with the oil and add some salt and pepper and the oregano. Roast for 25-30 mins, shaking half way through. Add the walnuts to the tin for the last 5 minutes of cooking time.
Add the rocket to a large serving bowl, top with the roasted veg, chickpeas and walnuts and scatter over some pomegranate seeds
Mix the dressing ingredients together and drizzle over the salad just before serving