1(1-oz) packageRanch seasoning mixOR your favorite herb-based seasoning mix OR make your own!
3sprigs fresh herbsI used rosemary and thyme, optional
Heat oven to 350°F. Line a rimmed baking pan with aluminum foil.
Heat oil in large skillet over medium-high heat. Lightly season pork tenderloin with salt and pepper, then brown in the hot skillet for 1-2 minutes on all sides.
Mash together butter, Ranch seasoning and minced garlic in a small bowl until combined.
Place browned pork loin on lined baking pan. Spread 3/4 of butter mixture over pork. If using fresh herbs, tuck next to pork.
Tent aluminum foil over pork and seal. Bake pork in hot oven for 12-20 minutes, until thickest part registers an internal temperature of 135°F.
Carefully remove pork from oven and open foil (hot!). Spread pork with remaining compound butter, then return to oven and bake uncovered for 5-10 minutes, until thickest part of pork registers an internal temperature of 145°F.
Rest pork for 5 minutes on the counter, then slice to serve.