Spicy mushroom & broccoli noodles

Name: Spicy mushroom & broccoli noodles
Prep time: 10 min
Cook time: 10 min
Total time: 20 min
Cuisine: Asian
Ingredients: 1 low-salt vegetable stock cube; 2 nests medium egg noodles; 1 small head broccoli broken into florets; 1 tbsp sesame oil plus extra to serve; 250g pack shiitake or chestnut mushroom thickly sliced; 1 fat garlic clove finely chopped; ½ tsp chilli flakes or crumble one dried chilli into pieces; 4 spring onions thinly sliced; 2 tbsp hoisin sauce; handful roasted cashew nuts