preheat the oven to 180 cook the potato in boiling salted water for 8-10 mn until tender .drain
while potatoes are cooking wrap a prosciutto slice around the middle of each salmon fillet.place on a baking tray drizzle with olive oil and season.bake for 5 mn then add tomato to tray drizzle with oil and season.coon for a further 4 mn or until salmon is cooked. meanwhile blanch the beans in boiling salted water for 2 mn toss drained beans and potato with pesto and serve with salmon and tomatoes.