Lox, or cured salmon, also known as gravlax, is not cooked in the traditional oven method sense but more of a curing or chemical reaction of cooking. Salmon has been preserved by using the salt cure method for centuries and it is a delicious way to enjoy one of my favorite fish. The salt and sugar mixture, along with any other flavors, will penetrate through the fish infusing the fish with flavors and cooking the salmon through an osmosis process.