Salmon with Lemon, Butter and Caper sauce

4 salmon filets

1 tablespoon unsalted butter

1 teaspoon freshly grated lemon zest

1 teaspoon drained bottled capers

1 tablespoon fresh lemon juice

Pat the salmon filets dry, sprinkle them with salt and pepper to taste, and broil them on the rack of a broiler pan under a preheated broiler about 4 inches from the heat for 8- 12 minutes, until opaque. While the filets are cooking, in a small saucepan melt the butter and stir in the zest, the capers, the lemon juice, and salt and pepper to taste. Transfer the salmon to plates and pour the sauce over them.