In a large bowl, add in your vermicelli and some hot water to soften the noodles for 5 minutes.
Place a large pan on the stove on medium-high heat and add in your oil.
Once your pan is hot, add in your garlic, onion, cabbage and carrot to cook for 4 minutes.
Next, add in your beef slices and mix together for 2 minutes. These beef slices are super thin and cooks very fast!
Create some space in the middle of your pan by pushing the ingredients to the sides and add in your oyster sauce, dark soy sauce, mirin, chilli flakes, brown sugar and water and mix together well.
Add in your vermicelli noodles and stir all together allowing the sauce to soak into the noodles and cook through.
Garnish with green onions, season with a little more salt and pepper (optional), serve and enjoy!