To Prep
In a small bowl, combine the sugar, fish sauce and water and mix well.
Then, add the lime juice, garlic and chilli. Mix and set aside for later.
Combine the sliced beef, oyster sauce, ½ tbsp minced garlic, lemongrass, salt, pepper, chicken stock and 1 tbsp vegetable oil in a mixing bowl. Mix well, making sure that the beef in evenly coated in the marinade. Let the beef marinade for 20 mins.
To Cook
Heat up a wok and add the remainder of the vegetable oil. When the oil has heated up, sauté the rest of the garlic until fragrant.
Next add the beef to the wok and fry until the beef is no longer pink.
Cook the rice vermicelli according to packet instructions. Drain the noodles when they are done and portion into individual bowls.
Add the mixed greens and cucumber on top the vermicelli and top with the stir fried beef. Garnish with the do chu, fried shallots, and crushed peanuts.
Use the dipping fish sauce as a salad dressing. Mix the salad with the dressing and serve.