1. To begin, trim any excess fat from the top of the pork loin. This helps ensure the roast cooks evenly and prevents excess grease. Next, place the roast on a large plate and coat all sides with the Worcestershire sauce. In a small bowl, mix together the kosher salt, paprika, onion powder, garlic powder, rosemary, and black pepper. Rub this seasoning mixture liberally onto the pork loin, making sure to cover all surfaces.

2. Preheat your oven to 425°F. Place the seasoned tender and juicy pork loin roast, fat-side up, on a foil-lined baking sheet. Roast the pork in the preheated oven for 15 minutes to lock in the moisture and get a nice sear on the outside.

3. After the initial high-heat roasting, reduce the oven temperature to 375°F and continue cooking for approximately 40-60 minutes, or until the internal temperature reaches 145°F when measured with an instant-read thermometer. This lower temperature allows the pork to cook through evenly, ensuring a tender and juicy result.

4. Once the tender and juicy pork loin roast reaches the desired internal temperature, remove it from the oven and tent it loosely with foil. Allow the roast to rest for 5-10 minutes before slicing. This resting period is crucial, as it allows the juices to redistribute throughout the meat, resulting in a moist and flavorful final dish.

5. To serve the tender and juicy pork loin roast, slice the roast into 1/2-inch thick slices. Arrange the slices on a serving platter and spoon any pan juices over the top.