In a small bowl, make the beef marinade by combining the 1 tsp baking soda, 1 Tbsp Light Soy sauce, 1 Tbsp Chinese Cooking wine, 2 Tbsp water, 1 Tbsp Cornstarch and ½ tsp White pepper. Whisk to combine.
Put the 1 lb flank steak in a bowl and pour the marinade over the top of it. Stir, then cover. Allow the beef to rest for about 30 minutes at room temperature.
Next, whisk all of the sauce ingredients (¼ cup water or beef stock, 2 Tbsp light Soy sauce, 2 tbsp Oyster sauce, 2 Tbsp Chinese cooking wine, 1 Tbsp dark soy sauce, 1 Tbsp Cornstarch, 1 ½ tsp granulated sugar) together in a bowl until combined.
Bring a large pot of water to a boil. Off to the side, have a large bowl filled with cold water and ice.
Place 1 lb broccoli in the boiling water for about 2 minutes, until the broccoli turns a vibrant green color. Then use a slotted spoon to remove the broccoli from the boiling water and place it in the ice water to stop the cooking process. Allow the broccoli to cool, then place it in a colander to drain all the way.
Once your meat is done marinating, you can begin your stir fry! Add 2 tbsp canola oil to a wok or other large pan and allow it to heat up.
Add 3 cloves minced garlic and 1 tbsp minced fresh ginger and stir fry for 20-30 seconds until it becomes fragrant but before it begins to burn.
Add the beef into the wok and continue stirring until the outside of the beef is brown and starts to char slightly on the outside.
Add the broccoli into the wok and toss with the beef for about a minute.
Pour the sauce into the wok and continue to toss the beef and broccoli over the heat until the sauce starts to boil and thicken. At this point, drizzle the 1 tsp sesame oil over the beef and broccoli and mix to combine one more time.
Serve the beef and broccoli over white rice and sprinkle with Sesame seeds. Serve and enjoy!