Prepare the Pork
Trim any excess fat thicker than ¼ inch from the pork loin. Pat dry with paper towels.
Season
In a small bowl, combine brown sugar, ginger, cumin, garlic powder, onion powder, ground mustard, thyme, marjoram, cayenne, and crushed red pepper. Rub the mixture evenly over the pork. Cover and refrigerate for 1–2 hours.
Sear
Heat olive oil in a large skillet or Dutch oven over medium-high heat. Sear the pork on all sides until well browned.
Roast
Transfer the pork to a roasting pan and arrange the potatoes, carrots, and onions around it. Roast at 375°F for 1 to 1¼ hours, or until the internal temperature reaches 145°F.
Make the Glaze
While the pork roasts, melt the butter in a small saucepan over low heat. Add garlic and cook for 1 minute. Stir in juice, honey, mustard, soy sauce, ketchup, vinegar, and ginger. Season with salt and pepper and simmer for 2–3 minutes.
Baste and Rest
Baste the pork with the glaze every 15–20 minutes during roasting. Once done, loosely tent with foil and let rest for 15 minutes before slicing.
