Heat oil in a pan, fry meat first about 1 minute till brown. Set aside. On the same pan, fry onions, garlic and then add all the vegetables, cook for about 5-8 minutes depending on how you like your vegetables.
Add meat and toss through for another minute. Sprinkle sesame seeds on top if you wish. It's ready to serve.
There are 257 calories in 1 serving of Beef Stir Fry.