Heat 2 tbsp of avocado oil in a skillet.
In a medium bowl, add the sliced beef, salt, pepper, and 2 tbsp arrowroot flour. Mix well and sear in the skillet for 2-3 minutes per side. Do this in batches if needed so you don't over-crowd the pan. Set aside.
Add the sesame oil and the garlic and broccoli. Cook for 4 minutes.
In a small bowl, add the coconut aminos, rice wine vinegar, broth, grated ginger, and 1/2 tsp arrowroot flout. Whisk well and add it to the broccoli.
Add the meat back into the skillet and stir for another 2-4 minutes until it thickens up.
Top with scallions and sesame seeds and serve.