01 - Peel and cut potatoes into 1/4-inch thick sticks. Rinse under cold water to remove excess starch, then soak in cold water for at least 30 minutes. Drain and pat thoroughly dry with kitchen towels.
02 - Heat vegetable oil in deep fryer or heavy-bottomed pot to 325°F. Fry potatoes in batches for 4–5 minutes until pale and tender. Remove with slotted spoon and drain on paper towels.
03 - Increase oil temperature to 375°F. Fry potatoes again in batches until golden and crisp, about 2–3 minutes. Drain immediately and season with salt.
04 - Combine softened butter, parsley, chives, lemon juice, minced garlic, and pinch of salt in small bowl. Mix thoroughly, shape into log using plastic wrap, and refrigerate until firm.
05 - Pat steaks completely dry with paper towels. Generously season both sides with salt and pepper.
06 - Heat olive oil in large skillet or grill pan over high heat. Sear steaks for 3–4 minutes per side for medium-rare, adjusting time for desired doneness.
07 - Transfer steaks to plate, top each with herb butter slice, and let rest for 5 minutes. Divide fries among plates, place steaks on top allowing butter to melt, garnish with fresh parsley if desired, and serve immediately.