Slice the flank steak against the grain into thin strips and season with sea salt and black pepper.
Heat one teaspoon of toasted sesame oil in a large skillet or wok over medium-high heat.
Add the beef strips to the skillet and sear until browned, approximately 2 to 3 minutes, then remove and set aside.
Add the remaining teaspoon of sesame oil to the pan along with the broccoli, bell peppers, and snap peas.
Stir-fry the vegetables for 4 to 5 minutes until they are tender-crisp and vibrant green.
Stir in the minced ginger and garlic, cooking for 30 seconds until the aromatics are fragrant.
Return the beef to the pan and pour in the coconut aminos, tossing all ingredients to coat evenly.
Serve the stir-fry immediately over a bed of steamed cauliflower rice and garnish with sesame seeds.