For the best sear, cook the beef in batches so the pan is not crowded and let the strips sit undisturbed for a minute before stirring. Adjust the jalapeño and red pepper flakes to match your preferred spice level, and remove all seeds for a milder bowl. If you do not have coconut aminos you can substitute tamari, but use a bit less and taste as you go because it is saltier. This dish keeps well in the refrigerator for up to four days; store the cauliflower rice and beef mixture separately if possible and add fresh avocado and cilantro after reheating for the best texture and flavor.