Whisk together all sauce ingredients. Set aside.
Using a serrated knife, slice the steak against the grain at an angle. Slice as thin as possible!!
Add sliced steak to a bowl and add arrowroot or starch. Toss to combine until the steak is fully coated.
Heat a large skillet over medium heat. Once hot, add 2 tablespoons oil to the pan. Add carrots and bell pepper and cover with a lid to steam for 3-5 minutes. Once the vegetables are tender, remove from pan and set aside.
Add remaining 2 tablespoons oil to the pan. Once hot, add the beef in batches and cook on medium-high heat until browned on either side. Remove from the pan and repeat with the remaining beef. It’s really important to not overcrowd the pan!
Return the previous batches of the cooked beef to the pan. Add in the cooked veggies, green onions, and sauce. Stir until well combined. Reduce heat and cover with a lid. Let cook for 4-5 minutes or until the sauce has thickened.
Serve with prepared rice and top with sesame seeds.