Preparation Melt 4 tablespoons butter in large skillet over medium-low heat. Add leeks and sauté until soft and transparent, about 15 minutes. Add vermouth and boil over high heat until liquid is reduced to 2 tablespoons, about 5 minutes. Add cream and boil until thickened to sauce consistency, about 2 minutes. Stir in 1/4 cup parsley and tarragon. Season to taste with salt and pepper. Remove from heat, cover to keep warm. Sprinkle salmon with salt and pepper. Dust salmon lightly with flour. Melt 2 tablespoons butter in each of 2 non-stick skillets over medium-high heat. Add 4 salmon fillets to each skillet and cook until opaque in center, about 3 minutes per side. Transfer salmon to plates. Spoon sauce over salmon. Sprinkle with additional parsley and serve.
Preparation Melt 4 tablespoons butter in large skillet over medium-low heat. Add leeks and sauté until soft and transparent, about 15 minutes. Add vermouth and boil over high heat until liquid is reduced to 2 tablespoons, about 5 minutes. Add cream and boil until thickened to sauce consistency, about 2 minutes. Stir in 1/4 cup parsley and tarragon. Season to taste with salt and pepper. Remove from heat, cover to keep warm. Sprinkle salmon with salt and pepper. Dust salmon lightly with flour. Melt 2 tablespoons butter in each of 2 non-stick skillets over medium-high heat. Add 4 salmon fillets to each skillet and cook until opaque in center, about 3 minutes per side. Transfer salmon to plates. Spoon sauce over salmon. Sprinkle with additional parsley and serve.