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). An electronic meat thermometer can be programmed to beep when the meat hits the target temperature. 2  Beef and lamb are medium rare when the internal temperature of the roast has reached 135Â°F; medium is 140Â°-145Â°F. Pork should be cooked to 145Â°F. 3  Veal is usually served medium (145Â°-150Â°F) or medium-well (155Â°F).
For the former Michigan State Senator, see John F. Kelly (politician). John Francis Kelly (born May 11, 1950) is the fifth and current United States Secretary of Homeland Security. He is a retired United States Marine Corps general and the former commander of United States Southern Command, the Unified Combatant Command responsible for American military operations in Central America, South America and the Caribbean.
John Francis Kelly is an American government official and retired general serving as the current White House Chief of Staff for President Donald Trump, previously serving as U.S. Secretary of Homeland Security in the same administration. Before entering the political sphere, Kelly was a United States Marine Corps general who served as commander of United States Southern Command, the unified combatant command responsible for American military operations in Central America, South America, and the