Heat a skillet to very hot. Cast iron is best, if you have it.

Add the oil to the pan, swirling to coat the bottom. You can skip the oil if you are using a nonstick pan or well-seasoned cast iron.

Add the meat to the pan and break it into large pieces.

As the beef begins to brown, continue to break the meat into smaller and smaller pieces.

Cook until browned. Try not to stir the beef too much; just stir occasionally until all of the beef is browned. Work in batches if you need to cook a lot of meat or are using a smaller pan.