Heat a large skillet or wok over medium-high heat until very hot.
Add the Wagyu ground beef to the dry skillet, seasoning with sea salt and black pepper.
Cook the beef while breaking it into small crumbles with a wooden spoon until browned and slightly crispy, then remove the beef from the pan and set aside.
Drain all but one tablespoon of the rendered beef fat from the skillet.
Add the broccoli florets to the skillet and sauté for 4 minutes until they are bright green and tender-crisp.
Stir in the minced garlic and grated ginger, cooking for 60 seconds until the aromatics are fragrant.
Add the cauliflower rice to the pan, tossing with the broccoli for 3 minutes to soften.
Return the cooked Wagyu beef to the skillet and pour in the coconut aminos and toasted sesame oil.
Stir-fry everything together for 2 minutes until the sauce coats the ingredients and the dish is steaming hot.
Garnish with thinly sliced green onions and serve immediately.