Beef with pak choi, mushrooms and noodles

Name: Beef with pak choi, mushrooms and noodles
Cook time: 30 min
Total time: 30 min
Cuisine: Asian
Ingredients: . 75g thin rice noodles; . 115g beef sirloin; . olive oil; . 1 teaspoon ground cumin; . sea salt; . ½ a red onion, finely sliced; . a thumb-sized piece of fresh ginger, peeled and finely sliced; . 1 fresh red chilli, deseeded and finely sliced; . a small handful of shiitake and oyster mushrooms, brushed clean and torn up; . 200ml chicken stock; . 1 pak choi, quartered