Mushroom, chicken and kombu broth

2 large handfuls of spinach leaves, shredded

3 or 4 pieces of dried Kombu, each roughly 5 inches long

1.5l good quality chicken stock

1 heaped tsp miso paste

1 thumb of ginger, peeled and cut into matchsticks

2 tbsp mirin

2 chicken breasts, sliced into pieces

1 carrot, peeled and cut into short matchsticks

200g of shiitake mushrooms, sliced

toasted sesame seeds, to serve