Heat sesame oil in a skillet over high heat. Add garlic and ginger & sauté for 2 mins to infuse flavor. Add steak, stirring frequently until browned. Once steak is seared add broccoli & continue to sauté over high heat.
Add onion, & an extra tablespoon of oil if needed. Pour in coconut aminos and season with salt & pepper & red pepper flakes. Continue to sauté for another 2-3 minutes, until all flavors have infused.
Garnish with a sprinkle of sesame seeds & serve.