First start the filling. Make a foil pouch and put in the salmon, prawns, fresh dill, chilli, garlic, lemon zest and a seasoning of salt and pepper. Drizzle over some olive oil and seal the parcel. Place on a baking tray and bake for 12–15 minutes until the salmon will flake when nudged with a fork and the prawns are pink. Remove from the oven, fold open the parcel and leave to cool. Leave the oven on.