For the sauce: 1/4 cup Champagne or white wine vinegar 1/4 cup good white wine 2 tablespoons minced shallots 3 tablespoons chopped fresh tarragon leaves, divided Kosher salt Freshly ground black pepper 3 extra-large egg yolks 1/2 pound (2 sticks) unsalted butter, melted 6 (1-inch thick) filet mignons Olive Oil Coarsely ground black pepper For […]