Preparation Preheat oven to 475°F with racks in upper and lower thirds, with a 4-sided sheet pan in lower third. Toss fries with 2 tablespoons oil in hot sheet pan, then bake according to package instructions until golden and crisp. Meanwhile, pat steaks dry, then rub with peppercorns and 1/2 teaspoon salt. Heat remaining tablespoon oil in an ovenproof 12-inch heavy skillet over medium-high heat until it shimmers. Sear steaks on all sides, about 3 minutes total. Transfer skillet to upper third of oven and roast 9 to 10 minutes for medium-rare. Transfer steaks to a plate and let rest 5 minutes. Add wine to skillet and boil, scraping up brown bits, until reduced by half, about 1 minute. Add water and meat juices from plate and boil briskly until reduced by half, 3 to 4 minutes. Whisk in butter until incorporated. Season with salt and pepper. Sprinkle fries with tarragon. Serve steaks with sauce and fries.
Preparation Preheat oven to 475°F with racks in upper and lower thirds, with a 4-sided sheet pan in lower third. Toss fries with 2 tablespoons oil in hot sheet pan, then bake according to package instructions until golden and crisp. Meanwhile, pat steaks dry, then rub with peppercorns and 1/2 teaspoon salt. Heat remaining tablespoon oil in an ovenproof 12-inch heavy skillet over medium-high heat until it shimmers. Sear steaks on all sides, about 3 minutes total. Transfer skillet to upper third of oven and roast 9 to 10 minutes for medium-rare. Transfer steaks to a plate and let rest 5 minutes. Add wine to skillet and boil, scraping up brown bits, until reduced by half, about 1 minute. Add water and meat juices from plate and boil briskly until reduced by half, 3 to 4 minutes. Whisk in butter until incorporated. Season with salt and pepper. Sprinkle fries with tarragon. Serve steaks with sauce and fries.