how long do i cook a 3.5 ib roast for medium rare
1 Roast in a roasting pan approximately 15 minutes per pound for medium-rare (a 3.5 pound roast will take about 45 minutes to cook) or to desired internal temperature. Preheat oven to 400Â°F. 2  Drizzle with olive oil, season with salt and pepper, and coat with garlic, herbs and breadcrumbs. 3  Roast in a roasting pan 20-35 minutes for medium-rare or to desired internal temperature.