Pour the soy sauce, lime juice, garlic powder, ground black pepper, and sriracha sauce into a bowl or ziplock bag and mix them together until the ingredients are well incorporated. This should take around 5 minutes then set the marinade aside.
Cut the beef flank into 1 1/2 strips
Add the beef strips into the marinade sauce and let it marinate for around an hour or more. You also have the option to store the meat and let it marinate till the next day.
Heat up a tablespoon of oil in a pan on medium heat.
Once the meat is done marinating and depending on how much you cut, cook them in the pan until it's browned. It can take around 5-10 minutes depending on how much you are cooking.
Drain the oil from the meat by putting it on a drying rack or using paper towels on a plate.
The dish is best enjoyed with rice and vegetables and pairs well with different sauces.