Preheat oven to 450°, Stir together salt, garlic powder, onion powder,
coriander and thyme in a small bowl. Sprinkle the rub over tenderloin with
a dry hand, turning and pressing tenderloin gently for rub to adhere.
Heat oil in a large oven-safe skillet over high. Add tenderloin to skillet;
cook, using tongs to turn and sear each side until golden brown, 8 to 10 minutes.
Place butter, garlic and rosemary in skillet around tenderloin. Place skillet in
oven, uncovered, and roast until a thermometer inserted in thickest portion
registers 145°, about 10 minutes. Remove from oven, and baste with butter.
Let rest at room temperature at least 10 minutes. Cut into ½-inch-thick
slices, and drizzle with cooking juices. Serve with your favorite side dishes like
sweet potato fries and roasted broccoli.