Add the leek and carrots and cook for 2 minutes. Add wine and cook for 8 minutes.
Add cream when the wine is totally absorbed and cook for 5 minutes.
Cut 2 sheets of aluminum foil and 2 sheets of parchment paper to make a small baking packet for each salmon filet.
Preheat oven to 360°F (180°C). Place each sheet of parchment paper on a sheet of aluminum foil. Line each sheet of parchment paper with half the leek and carrots mixture.Place a salmon filet on top of each.
Close each parchment paper and aluminum foil packet.Put them in the oven for 20 minutes.
Open the packets and let the steam out.Serve with tagliatelle pasta on the side.