Thinly slice the flank steak against the grain into bite-sized strips to ensure maximum tenderness.
In a small glass bowl, whisk together the coconut aminos, raw honey, minced ginger, minced garlic, and red pepper flakes to create the stir-fry sauce.
Heat the avocado oil in a large stainless steel skillet or wok over medium-high heat until it begins to shimmer.
Add the beef strips in a single layer, searing for approximately 2 minutes until deeply browned, then remove the beef from the pan and set it aside on a plate.
Add the broccoli florets to the hot pan with two tablespoons of water, immediately covering with a lid to steam for 3 minutes until vibrant green and tender-crisp.
Remove the lid and return the beef to the pan, then pour in the whisked sauce and the toasted sesame oil.
Toss everything together for 1 to 2 minutes over high heat until the sauce reduces slightly and creates a glossy coating over the beef and broccoli.
Transfer to a plate and garnish with sesame seeds before serving immediately.