Heat oil in wok/frying pan over medium high heat. Add garlic and onion, sauté until fragrant for about 2 minutes. Add in sliced beef, stir and toss until beef is cooked thorough. Add in teriyaki sauce, carrot, and broccoli, stir to combine. cook for 2 minutes. Remove from heat.
Add rice to serving dish. Pour teriyaki beef mixture over rice.