1.In a large saucepan of boiling, salted water, cook pasta following packet instructions. Drain well and return to pan.
2.Heat oil in a medium saucepan on high. Saute onion, garlic and chilli 1-2 minutes, until onion is tender.
3.Add wine and mussels. Cook, covered, 2-3 minutes, until mussels open. Stir in tomatoes and prawns. Simmer 3-4 minutes, until prawns change colour. Stir pasta through and cook 1 minute, until hot. Season to taste.
4.To make fennel salad, combine fennel, rocket, onion and pine nuts in a bowl. In a jug, whisk together juice, oil and mustard. Season to taste. Drizzle over salad.
5.Serve pasta topped with fennel fronds. Accompany with fennel salad.