3 pan seared mustard peppercorn steak sauce Recipes

dried shiitake mushroom (about 1 cup), multiclor peppercorns, whole mustard seeds, kosher salt, divided, new york strip steaks, butter, divided, shallot, chopped, mushroom soaking liquid, dijon mustard

steaks, trimmed, kosher salt, freshly ground black pepper, butter, minced shallots, green peppercorns , preferably in brine, lightly crushed, brandy, dijon mustard, lemon juice, lemon zest, worcestershire sauce, veal stock , home-made or store-bought, fresh tarragon, washed, dried, leaves finely chopped, fingerling potatoes, washed and dried, coarse sea salt, bay leaves