Preheat over to 375° F.
Remove salmon and let sit for 30 minutes at room temperature.
Rub extra virgin olive oil on both sides of the fish. Add salt to fish.
Spinkle both sides of the fish with rosemary.
Add a thin layer of water to a cooking sheet so that the water just covers the sheet.
Transfer the fish to the cooking sheet.
Bake for 20 minutes.