Cook Aromatics: In a large skillet over medium heat, add the sesame oil. Once hot, add the diced shallot and grated ginger, cooking for 1–2 minutes until fragrant.
Brown the Beef: Add the ground beef to the skillet, breaking it up with a spatula. Cook until browned, about 5–7 minutes.
Season the Beef: Sprinkle the red pepper flakes, garlic powder, and onion powder over the beef. Stir in the coconut aminos and fish sauce, cooking for another 2–3 minutes until the sauce has slightly reduced and the beef is well-coated.
Prepare Cauliflower Rice and Greens: While the beef cooks, prepare the cauliflower rice according to package instructions or steam it in a separate skillet. Place a portion of chopped greens into each bowl as the base.
Assemble Bowls: Divide the cauliflower rice among the bowls, layering it over the greens. Top with the seasoned Korean beef.
Optional Sauce and Toppings: If using the optional sauce, combine mayo and hot sauce in a small bowl, adjusting the spice level to taste. Drizzle over each bowl. Add chopped green onions and sliced avocado for extra flavor and texture.