Start by marinating the beef. Thinly slice 2 lbs of flank steak into 2” long pieces. Marinate the beef in the refrigerator for 30 minutes with 1 tbsp cornstarch, 1 tbsp baking soda, and 3 tbsp soy sauce.
While the beef is marinating, prepare the sauce. Mix ¼ cup hoisin, ¼ cup brown sugar, 2 tbsp rice vinegar, 1 tbsp soy sauce, 1 tbsp oyster sauce, 2 tbsp sweet chili sauce, 2 tbsp apple cider vinegar, and 2 tbsp ketchup in a bowl. Set aside.
Heat a large frying pan to medium high heat. Once heated, drizzle with a little bit of vegetable oil and sear the marinated beef for about 3 minutes until golden brown. This time may vary based on how thick you cut the steak. Adjust the time as needed until the steak is golden brown.
Remove the cooked steak from the pan and set aside to cool. Keep the pan on the heated stovetop.
Chop 2 medium sized bell peppers, ½ of an onion, 5 cloves of garlic and 1 tbsp of fresh ginger.
Cook the onions for about 2 minutes, then add in the chopped garlic and ginger for an additional 2 minutes. Add the steak back to the pan along with the sauce.
Allow to simmer on low heat for at least 5 minutes. We want to allow it to simmer together just enough for the meat and vegetables to soak up the sauce.
Serve with rice or side of your choice. Enjoy!