Slice the flank steak against the grain into thin, bite-sized strips to ensure maximum tenderness.
In a small glass bowl, whisk together the tamari, honey, toasted sesame oil, minced ginger, and red pepper flakes to create the stir-fry glaze.
Heat the avocado oil in a large wok or stainless steel skillet over medium-high heat until it begins to shimmer.
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 set aside.
In the same skillet, add the broccoli, bell pepper, and carrots, sautéing for 4 minutes until they are tender-crisp and vibrant.
Stir in the minced garlic and shelled edamame, cooking for 1 minute until the garlic is fragrant.
Return the beef to the pan and pour the sesame-ginger glaze over the mixture, tossing for 1-2 minutes until the sauce is glossy and coats all ingredients.
Serve the stir-fry immediately, garnished with toasted sesame seeds for a delicate final crunch.