roasting time temperature meats
1 Place the meat in the oven and cook for 20 to 30 minutes at the high temperature. 2  Then lower the temperature to between 275Â°F and 325Â°F and roast until done (see doneness guidelines below). Don't cover the pan. 2  If you are using a meat thermometer (analog or digital), insert the probe into the center of the roast, being careful not to hit bone. 3  Place the meat in the oven and cook for 20 to 30 minutes at the high temperature.