Slice the flank steak against the grain into thin, bite-sized strips to ensure maximum tenderness.
In a small bowl, whisk together the coconut aminos, minced garlic, and grated fresh ginger until well combined.
Heat the toasted sesame oil in a large skillet or wok over medium-high heat until shimmering.
Add the beef strips in a single layer, seasoning with sea salt and black pepper, and sear for 2 minutes until browned.
Remove the beef from the pan and add the broccoli florets with a splash of water, covering to steam for 2-3 minutes.
Return the beef to the skillet and pour the sesame-ginger sauce over the meat and vegetables.
Stir-fry for an additional minute until the sauce is glossy and everything is thoroughly coated.
Garnish with sesame seeds and serve immediately for a crisp, savory experience.