Step 1: Brown the Beef and Onion - Heat the olive oil in a large,
deep sided skillet over medium high heat. Once the oil is warm, add the ground beef, diced onion, salt, and black pepper. Let the beef sit against the hot skillet for a little while before you break it completely apart. That contact with the pan helps create those browned bits that add so much savory flavor. Continue cooking for about 5 to 7 minutes, stirring and breaking the beef into bite sized crumbles as you go. The beef should be fully cooked and the onion should look soft and translucent. If you have quite a bit of grease in the pan, carefully drain the excess before moving on.