Tenderize the beef by soaking it in a solution made from the baking soda and water, for about 15 minutes. Don't leave it too long if you still want a 'bite'.
Rinse the beef of the soda water, and marinade. Set aside.
Heat up a big pot/wok with the cooking oil at medium heat.
Fry 1 Tbsp of the garlic and when golden brown, add the noodles. Remove from the pot after 2 minutes.
Using the same pot, add all the noodle sauce ingredients. When it is boiling, add the beef and the vegetables. Cook till beef is done the way you want. I like mine medium rare.
Serve immediately, enough for 4.