When I ran sudo apt-get install apt-transport-https, I received the exact same error. I have checked my sources.list and sources.list.d files for syntax errors and for sites that redirect to https, and am still having the same issue. I am connected via a school's ethernet.
To cook filet mignon on a charcoal grill, cook the meat uncovered using medium coals, turn once while grilling, wrap in foil after transferring to a plate, and serve after five minutes. When cooking a 1-inch cut, grill for 10 to 12 minutes to achieve a medium-rare steak and 12 to 15 minutes to achieve medium-done meat.
There's no simple answer. Cook time will depend on thickness and temp of meat as well as temp of the heat source. For a tall (3) filet I cook for 8 min per side over medium heat and get a nice medium rare. Wait till the blood rises to the top of the steak, then flip it over. Cook for half the time on the second half.