Oysters With Crème Fraîche, Lemon And Tarragon - Ingredients

• 1/2 cup crème fraîche or sour cream
• 1 tablespoon minced fresh tarragon
• Grated zest of 1 lemon
• 2 tablespoons Pernod, simmered to reduce in volume to 1 teaspoon
• 1 1/2 teaspoons undiluted orange juice concentrate
• 1/2 teaspoon salt
• Dash of cayenne pepper
• Kosher or rock salt (for layering)
• 16 large oysters