Thinly slice the flank steak against the grain into bite-sized strips.
In a small bowl, whisk together the coconut aminos, toasted sesame oil, honey, grated ginger, and minced garlic.
Heat the avocado oil in a large skillet or wok over medium-high heat until shimmering.
Add the beef strips to the pan in a single layer, seasoning with sea salt and black pepper.
Sear the beef for 2-3 minutes until browned, then remove from the pan and set aside.
Add the broccoli florets and sliced red bell pepper to the same pan, stir-frying for 4-5 minutes until tender-crisp.
Return the beef to the pan and pour the prepared sesame-ginger sauce over the top.
Toss everything together for 1 minute until the sauce thickens slightly and coats the ingredients.
Garnish with sesame seeds before serving.