In a small bowl, whisk all of your Teriyaki sauce ingredients, then set aside.
Heat a large skillet over medium-high heat.
Add beef and season with a tiny pinch of sea salt and pepper.
Cook stirring and breaking the meat with a wooden spoon, until cooked through and lightly browned, about 6-8 minutes. Drain excess grease from meat.
Stir in the veggies and cook for additional 3-4 minutes, then pour in your Teriyaki sauce and gently stir to combine, cooking for 1-2 minutes more, over medium-high heat.
Sprinkle with green onions and sesame seeds and enjoy!
Stays GREAT for up to 4 days in sealed containers in the fridge.