Add the coconut aminos, rice wine vinegar, arrowroot, garlic powder, ginger powder, 1/4 teaspoon salt and fish sauce to a blender or food processor and briefly blend to combine.
Add the chopped, pitted dates and blend until the sauce is completely smooth. Depending on your appliance, this may take several minutes. Set aside.
Add the sesame seeds to a large skillet (with a lid) and place over medium heat. Cook, stirring and tossing occasionally, until golden brown, about 5-8 minutes. Keep an eye on them! They go from golden brown to burnt pretty quickly. Remove to a small bowl or plate.
With the pan still over medium heat, add the water and broccoli. Cover and let cook for two minutes, until just tender. Remove the broccoli to a medium bowl.
Turn the heat up to high. Add the steak and any accumulated juices in the bowl/container and cook until browned and cooked through, about 3-4 minutes per side.
Add the sauce and broccoli and cook for another 1-2 minutes, stirring frequently, until everything is evenly coated and warmed through.
Remove from the heat and stir in the sesame seeds. Taste and stir in extra salt, if necessary, and freshly ground black pepper. Then serve and enjoy!