Step 1 - Gather all ingredients.
Step 2- Heat vegetable oil in a large wok or skillet over medium-high heat; add beef and stir-fry until browned, 3 to 4 minutes.Step 3 - Move beef to the side of the wok and add broccoli, bell pepper, carrots, green onion, and garlic to the center of the wok; stir-fry vegetables for 2 minutes.
Step 4 - Stir beef into vegetables and season with soy sauce and sesame seeds. Continue to cook and stir until vegetables are tender, about 2 more minutes.Step 5 - Serve hot and enjoy!
Source: https://www.allrecipes.com/recipe/228823/quick-beef-stir-fry/