When cooking a 2 lb (approximately 0.9 kg) pork tenderloin, the cooking time can vary depending on the cooking method and desired doneness. Here are some general guidelines:
Oven Roasting: Preheat your oven to 425°F (220°C). Season the pork tenderloin with your desired seasonings or marinade. Place the tenderloin on a roasting pan and roast it in the preheated oven for about 20 to 25 minutes. Check the internal temperature with a meat thermometer. The pork tenderloin is ready when it reaches an internal temperature of 145°F (63°C). Remove it from the oven and let it rest for a few minutes before slicing.
Grilling: Preheat your grill to medium-high heat. Season the pork tenderloin and place it directly on the grill grates. Grill the tenderloin for about 15 to 20 minutes, turning occasionally, until the internal temperature reaches 145°F (63°C). Again, it's important to use a meat thermometer to ensure accurate cooking. Once done, remove the tenderloin from the grill and allow it to rest for a few minutes before slicing.
Remember that these cooking times are approximate and can vary depending on factors such as the thickness of the tenderloin, the specific heat of your oven or grill, and personal preferences regarding the level of doneness. It's always best to rely on a meat thermometer to determine the exact doneness and ensure that the pork tenderloin is safe to eat.