Step 2: Brown the Beef and Vegetables - Place a
large skillet over medium heat and add the ground beef, diced onion, and bell pepper. As the beef cooks, break it apart with a spoon or spatula so you end up with small crumbles throughout the skillet. Cook everything until the meat is no longer pink and the vegetables have softened. The onion should smell sweet and savory by this point, and the peppers should have just a little tenderness left.