Pork Loin Roast with Potatoes and Carrots

Pork loin roast with potatoes and carrots is a full dinner you can cook in one oven. I make it on weeknights when I want the meat and vegetables done at the same time without standing over the stove. Pork loin is lean, but it stays nice and juicy when you do not leave it in the oven too long. The thyme and garlic rub gives the outside good flavor without adding too many ingredients.

This version keeps the pork and the vegetables on separate trays so the potatoes and carrots crisp instead of steaming in the meat juices. I leave the skins on both for a more earthy flavor, and a little cayenne in the rub gives the roast a slight kick. I make my apple cranberry pork chop the same way when I want the meat and sides together, and my taco bake is another easy oven dinner for busy nights.

What is Pork Loin Roast?

Pork loin roast is a lean, boneless cut taken from the muscle along the pig’s back. It is seasoned and cooked whole in the oven. It is wider and more uniform than pork tenderloin, which is smaller and cooks faster, so the two are not interchangeable. Once you add potatoes and carrots, you have the main dish and sides on one plate.

Ingredients

• Pork loin – A lean, boneless roast that stays tender when you do not overcook it. Look for a piece with a thin fat cap on top, which bastes the meat as it roasts. Do not swap in pork tenderloin here. It is smaller and finishes much faster.
• Potatoes – They roast up creamy inside with crisp edges. I leave the skins on for more flavor and less work. Any waxy or all-purpose potato holds up well in the oven.
• Carrot – Turns sweet and tender as it roasts.
• Red onion – Softens and goes mild and sweet as it roasts. A yellow onion works if that is what you have.
• Fresh thyme – The main herb in the rub. It holds up to the oven heat without turning bitter. Dried thyme works in a pinch. Use about a third of the amount.
• Garlic powder – Gives garlic flavor without the risk of fresh garlic burning in the oven.
• Cayenne pepper – Just a small amount. Leave it out if you do not want any heat.

How to Cook Pork Loin Roast with Potatoes and Carrots

1. Make the Rub

Mix it into a paste so it coats the pork evenly.

1. Combine the fresh thyme, garlic powder, salt, black pepper, cayenne, and olive oil in a small bowl.
2. Mix until it comes together into a loose paste.

2. Season the Pork

After rubbing the pork, let it sit for a few minutes while you heat the oven.

1. Rub the paste over the entire pork loin, coating all sides.
2. Let it sit for 15 minutes while you heat the oven to 400°F and prep the vegetables.

3. Prep the Vegetables

Toss the vegetables well so the oil and seasoning reach every piece.

1. Place the potatoes, carrot, and red onion in a large bowl.
2. Add olive oil, salt, and black pepper.
3. Toss until everything is evenly coated.

4. Roast the Pork and Vegetables

The pork goes on a rack so the heat reaches all sides at once. The vegetables get their own tray in a single layer, which is what keeps them crisp rather than steaming in the pork drippings.

1. Set the pork loin on a roasting rack over a roasting pan.
2. Spread the vegetables on a separate baking tray in one layer.
3. Roast both for about 35 minutes, until the pork reaches an internal temperature of 140°F at the thickest part.

5. Rest and Slice

Resting keeps the juices in the meat instead of letting them run out onto the board.

1. Take the pork and vegetables out of the oven.
2. Let the pork rest for 10 minutes before slicing.
3. Slice and serve with the roasted potatoes, carrot, and onion.

How Long to Roast a Pork Loin

The honest answer is to roast by temperature, not by the clock. A pork loin roast is lean, so a few minutes too long is the difference between juicy and dry.

At 400°F, plan on roughly 20 minutes per pound as a rough guide, then start checking the center early with a thermometer. A thinner 2 to 3 pound loin can be ready around the 35-minute mark, while a thicker or heavier roast takes longer. Pull the pork loin at 140°F and let it rest, since carryover heat brings it up to a safe 145°F as it sits. Roast it uncovered and fat side up so the top browns, and tent it loosely with foil only if it colors too fast before the center is done.

Tips

• Use a meat thermometer – This is the easiest way to avoid dry pork loin.
• Match the vegetable sizes – Cut the potatoes and carrots into similar cubes so they finish at the same time. Uneven pieces leave some still firm while others overcook.
• Start checking early – If your loin is thinner or under 3 pounds, check the temperature before the 35-minute mark so it does not overshoot.
• Pat the pork dry first – A dry surface takes the rub better and browns more evenly in the oven.
• Save the pan drippings – Spoon the juices from the roasting pan over the sliced pork. This gives the sliced pork a little more moisture and flavor.
• Plan for leftovers – Cold sliced pork makes a good sandwich the next day, or chop the extra into fried rice or a grain bowl.

What to Serve with Pork Loin Roast

The pork already has potatoes and carrots with it, so I usually keep the sides simple.

• Bacon wrapped asparagus – Roasts in the same oven, salty and savory next to the pork.
• Easy cucumber salad – The cool, vinegary crunch tastes good beside the warm pork.
• Chickpea salad – A heartier cold side when you are feeding a bigger group.
• Buttered corn – A quick, sweet side that the kids reach for first.
• Dinner rolls – Good for soaking up the pan drippings.

Storage and Reheating

Let the pork and vegetables cool, then keep them in an airtight container in the fridge for 3 to 4 days. Freeze the sliced pork for up to 2 months. Reheat in a 300°F oven, covered, so the meat warms through without drying out. I skip the microwave for the pork because it tends to toughen.

More Easy Dinners to Try

A few more simple dinners I come back to.

• Grilled pork belly – Smoky, crisp-edged pork for when you want to cook outside.
• Baked ginger glazed mahi-mahi – Another oven dinner, this time with a sweet ginger glaze.
• Oven baked blackened tilapia – A fast weeknight fish with a dark, spiced crust.
• Bacon wrapped shrimp with cream cheese stuffing – A richer option when you want something a little special.
• Sweet and sour fish – A saucier dinner when you want more flavor on the plate.

Frequently Asked Questions

What is the difference between pork loin and pork tenderloin?

Pork loin is a wide, boneless roast that usually weighs 2 to 4 pounds. Pork tenderloin is a smaller, narrow cut that cooks much faster. They are not interchangeable, so use a true pork loin for this recipe.

How long does it take to roast a pork loin?

This recipe roasts a 3-pound loin at 400°F for about 35 minutes, but the temperature matters more than the clock. Start checking early and pull the pork once the center reaches 140°F at the thickest part.

What internal temperature should pork loin reach?

The safe target is 145°F. Pull the roast at 140°F and rest it before slicing, since the last few degrees come up on their own while it sits.

Can I use different vegetables?

Yes. Sweet potatoes, parsnips, or Brussels sprouts all roast well here. Cut them to a similar size as the potatoes and carrots so everything finishes at the same time.

Why did my pork loin turn out dry?

Almost always, it stayed in the oven too long. Pork loin is lean, so a few extra minutes past 145°F dries it out. A thermometer is the fix.

Try this on a night when you want a simple pork dinner with the sides already handled. Tell me how it went in the comments.