Remove the tray from the oven, toss the potatoes gently with the broccoli, olives, ½ tbsp of the remaining olive oil and season with some pepper. On a second baking tray, arrange the trout fillets and drizzle with the remaining olive oil and season. Put both trays in the oven to roast for 10-15 mins until the trout is just cooked and the potatoes are tender.
