Sheet pan pork tenderloin is an easy all-in-one dinner made with juicy roasted pork, tender baby potatoes, and green beans seasoned with a simple glaze.
Preheat the oven to 400°F and line a large sheet pan with parchment paper.
In a small bowl, whisk together the garlic, Dijon mustard, honey, 2 tablespoons of the olive oil, Italian seasoning, paprika, and half of the salt and pepper.
Place the pork tenderloin on the sheet pan and spoon the Dijon mixture over the top, coating it well.
In a separate bowl, toss the halved baby potatoes with 1 tablespoon of olive oil and a pinch of the remaining salt and pepper. Spread them on the sheet pan around the pork.
Bake for 20 minutes, then remove the pan from the oven.
Toss the green beans with the remaining 1 tablespoon of olive oil and the rest of the salt and pepper. Add them to the open space on the pan.
Return the pan to the oven and bake for another 10 to 15 minutes, or until the pork reaches 145°F and the potatoes are tender.
Let the pork rest for 5 minutes, then slice and serve with the potatoes and green beans.
Use pork tenderloin, not pork loin: Pork tenderloin is smaller, leaner, and cooks much faster, which makes it the right choice for this sheet pan dinner.
Cut the potatoes evenly: Halve smaller baby potatoes and quarter any larger ones so they roast in the same amount of time.
Add the green beans later: Since green beans cook faster than the pork and potatoes, adding them partway through keeps them from getting too soft.
Check the pork with a thermometer: Pork tenderloin is done when it reaches an internal temperature of 145°F. Let it rest before slicing so it stays juicy.
Do not overcrowd the pan: Spread everything out as much as possible so the potatoes roast instead of steam.
Slice after resting: Let the pork rest for about 5 minutes before slicing to help keep the juices in.