Cook rice noodles according to directions and drain. Set aside until needed.
In a medium-size bowl whisk together soy sauce, water, oyster sauce, dark brown sugar, and fish sauce. Set aside until needed.
In a larget high sided skillet (or wok) add olive oil and set over high heat.
When the oil is hot add the beef, Thai red chilies, bell pepper, and onion.
Saute quickly to help quickly cook the beef and vegetables. Move the ingredients around in the pan so they do not burn.
Add in the garlic and saute for 30 seconds.
Pour in the prepared sauce and noodles.
Toss to combine and continue cooking until the sauce has cooked down and starts to coat the noodles. You want a little brown on the noodles so don't be scared of some char.
Remove from heat and stir in Thai basil and green onions.
