Heat the Oil: Heat oil in a large pot or pan over medium heat.
1 tablespoon oil
Sauté the Aromatics: Add the garlic, ginger, and chilies (according to your spice preference) to the hot oil and sauté for 30 seconds, until fragrant.
2 tablespoons finely chopped garlic, 2 tablespoons chopped ginger, 3 green chillies
Add the Spring Onions: Add the spring onions and cook for another minute, until softened.
2 tablespoons finely chopped spring onions
Incorporate the Vegetables: Add the chopped capsicum, cauliflower, carrots, cabbage, and mushrooms (if using) to the pot. Stir-fry for a few minutes, until the vegetables are slightly softened.
2 tablespoons finely chopped capsicum, 2 tablespoons finely chopped cauliflower, 2 tablespoons finely chopped carrots, 2 tablespoons finely chopped cabbage, 2 tablespoons finely chopped mushrooms
Flavor Up: Add the soy sauce, salt, and freshly crushed black pepper to taste.
3 teaspoons soy sauce, Salt and freshly crushed black pepper to taste
Simmer and Thicken: Pour in the vegetable stock and bring to a boil. Reduce heat and simmer for 5 minutes.
4 ½ cups clear vegetable stock
Thicken the Soup: Gradually whisk the corn flour slurry (corn flour dissolved in water) into the simmering soup until it reaches your desired consistency.
2 tablespoons cornflour dissolved in ½ cup water
Garnish and Serve: Remove the pot from heat and stir in the chopped coriander leaves and mint leaves (if using). Garnish with boiled noodles (optional) and serve hot.
1 tablespoon fresh finely chopped mint leaves, 1 tablespoon chopped coriander leaves, Boiled noodles, Additional chopped mint and coriander leaves