Place steak on a rimmed sheet pan; pat dry thoroughly and add 1 tablespoon soy sauce over each steak. Massage into steak on all sides and season with pepper. Transfer steaks onto a clean rimmed sheet pan in a single layer. Sprinkle steaks evenly with cornstarch on both sides. Shake off any excess, then brush lightly with vegetable oil.
In a small bowl mix together vegetable oil, ginger, garlic, brown sugar, and ketchup. Set aside.
Heat oil in a large skillet over medium heat.
Place steak on skillet cook 3 to 4 minutes per side. Brush glaze on both sides of steak and cook 1 more minute on each side until glaze is caramelized.
Return steaks to the sheet pan. Place the sheet pan of steaks in the preheated oven, and cook 25 minutes, or to an internal temperature of 145 degrees F (63 degrees C).