how long does it take to do a tri- tip in the oven
3. Oven-roasting the tri-tip roast Place roast in the oven and roast, uncovered, for 30 to 35 minutes or until the thermometer registers 135 degrees F. Remove from the oven and cover with foil. Let the meat stand for 15 minutes, which will bring the temperature up to 145 degrees F (medium rare) after standing.ooking Tri-Tip Steaks. You can ask the butcher to cut a tri-tip roast into 3/4- to 1-inch-thick steaks. These are best suited for broiling in the oven. 1. Seasoning Tri-Tip Steaks. 1  Marinating for 2 to 3 hours in your favorite marinade is not essential but will help keep the steaks tender and moist while cooking.