1. Prep the Beef Perfectly: Start by patting your roast completely dry with a paper towel; this helps create a lovely crust! Generously rub the olive oil, salt, pepper, rosemary, Italian seasoning, and minced garlic all over the beef. For the best flavor and even cooking, let it sit at room temperature for at least 30 minutes, or you can even refrigerate it overnight.
2. Ready the Veggies: While your beef preps, preheat your oven to 425°F. In a large mixing bowl, combine the quartered onions, carrots, and potatoes with the vegetable oil, salt, pepper, and balsamic vinegar. Toss everything together until the veggies are nicely coated.
3. Roast to Perfection: Place your seasoned roast in a roasting pan, ideally with a rack. Spread your prepared vegetables evenly around the beef. Pop it into your preheated 425°F oven and bake for 20 minutes. Then, reduce the oven temperature to 350°F and continue roasting for about 1.5 hours, or until a meat thermometer inserted into the thickest part reads 140°F for medium-rare (or 155°F for medium, approximately 2 hours total).
4. Crucial Resting Time: Once the roast reaches your desired doneness, remove the pan from the oven and loosely cover it with aluminum foil. Let the roast rest for 15-20 minutes. This essential step allows the juices to redistribute, ensuring a tender, moist, and flavorful result.
5. Slice & Serve: Finally, slice your beautifully roasted beef and serve it alongside the caramelized roasted vegetables. Enjoy this wholesome and delicious holiday meal!