Salmon lends itself to a number of cooking methods, but it is particularly well suited to moist-heat cooking. One of the simplest ways to do that is to wrap the salmon in a foil packet, along with shallots and a splash of white wine. The packets can be cooked in the oven or on an outdoor grill. Herbs, abundant in early summer, contribute fresh, lively flavors to this selection of sauces. It is easy to adjust the number of servings of salmon, making a smaller packet for one or two or two packets for a larger group. The sauces all keep well and can be used for a variety of dishes.