Chinese restaurants tenderise economical cuts of beef so they are tender and juicy in stir fries. It's also done for chicken. There's a few methods - this baking soda way is the easiest, fastest and highly effective. Though I'm sharing this with beef stir fries in mind, don't just limit yourself to Asian food. This beef can be used for any recipe calling for strips of beef to be cooked quickly, like Beef Stroganoff. Do not use this method for whole steaks (read Note 4).