Step 1

Preheat oven to 425 degrees.

Step 2

Season all sides of the tenderloin with Italian seasoning, salt, and pepper.

Step 3

Heat oil in a large heavy-bottomed skillet, such as cast iron, over high heat.

Step 4

Add the pork to the skillet and sear for 2-3 minutes per side.

Step 5

Transfer skillet to the oven and bake for 15 minutes or until the pork reaches an internal temperature of 145 degrees.

Step 6

Remove from oven and let rest for 5 minutes.

Step 7

While pork is resting, whisk together the butter, garlic, onion powder, and parsely.

Step 8

Pour the garlic butter over the pork.

Step 9

Slice pork into 1-inch thick slices and serve.