Easy Miso Soup with Mushroom

Name: Easy Miso Soup with Mushroom
Ingredients: 800ml vegetable broth; 2 tbsp miso (more or less depending on your preference (taste as you make the soup)); 280 g extra firm tofu (sliced into cubes); 200 g mushrooms (sliced (I used shiitake mushrooms)); 200 g cooked udon noodles (or 150g of uncooked udon noodles (optional)); 4 garlic cloves (finely sliced); 1 inch ginger (finely sliced into matchsticks); 3 tbsp vegetable oil; 3 g cilantro (finely chopped); 2 scallions (finely sliced); 1 red chilli (finely sliced); 1 tbsp chilli oil