Cut your steak into 1" strips. Whisk 2tbs cornstarch with 3tbs of water, add beef & toss to combine. In a separate bowl, whisk 1tbs cornstarch with soy sauce, brown sugar, garlic, ginger (if desired) & set aside.
In a saute pan, heat over medium heat. Add 1tbs of vegetable oil & 1tbs of sesame seed oil to pot. Add beef & cook, stirring occasionally until beef is almost cooked through. Use a slotted spoon to remove beef & put on a plate & set aside.
Add 1tbs of olive oil to pan, once hot, add onions & broccoli, stirring occasionally for about 4-5min.
Return beef to pan & add sauce. Bring to boil & let cook 1-2 min, stirring occasionally. For a more tender beef, place a lid on pan & let cook 5-10 min or until your desired tenderness. Best over white rice or noodles.
