Lay each slice of beef flat, place some mushrooms or shredded carrots on top, and gently roll it up.
When you reach the end of the roll, spread a little cornstarch on the edge, then finish rolling and press it firmly to seal. Set aside for later use.
Add 2 tsp of oil to a frying pan and heat it over high heat. Place the beef rolls seam-side down and sear until golden brown. Sprinkle seasoning over the surface of the beef.
Flip to the other side and cook until golden brown, then remove and drain it over a sieve
Add the sauce mixture to the frying pan and bring to a boil. Then, add the starch mixture to thicken the sauce until it reaches a desired consistency.
Turn off the heat and return the beef rolls to the pan, coating them thoroughly in the sauce. Plate the rolls and sprinkle with sesame seeds before serving. Enjoy