Ma yi shang shu (sweet potato noodles with pork)

Name: Ma yi shang shu (sweet potato noodles with pork)
Prep time: 15 min
Cook time: 20 min
Total time: 20 min
Yield: 4 portions
Ingredients: 180 g sweet potato noodles; hot water; 1 garlic clove; 3 - 5 cm piece fresh ginger; 2 fresh shiitake mushrooms; 50 g pork fillet; 1 tsp vegetable oil; 1 tsp dried chilli flakes; 1 tbsp Shaoxing wine; 1 tsp dark soy sauce; 2 tbsp light soy sauce; 1 tbsp white sugar; 60 g water; 1 spring onion/shallot