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.