This Sheet Pan Lamb Dinner makes holiday entertaining easy. Lamb is roasted with potatoes, tomatoes, lemons and olives until perfectly cooked and ready to serve.
Arrange potatoes, red onion, olive bar items, tomatoes and sliced lemon on a rimmed sheet pan. Drizzle with olive oil and ½ teaspoon salt. Toss to combine.
Combine ½ teaspoon salt, with dijon mustard, rosemary, oregano, onion powder and black pepper. Rub this mixture over the lamb roast.
Roast until an instant-read thermometer registers 125°F to 130°F for medium rare, 60 - 75 minutes, or 130°F to 135°F for medium, 75-90 minutes. Transfer the lamb to a cutting board and let it rest for 10 minutes before carving.