Heat up a pot over medium heat. Dice onion and garlic and add to pot with other ingredients. Cook for 5mins.
Season with salt and pepper. Add vegetable stock and water and stir. Bring to low boil, then reduce heat to simmer. Cover and cook for 20mins, or until veggies are soft.
Transfer to blender and blend until smooth. Add peanut butter and chili garlic sauce (1-2 tsp) and blend again.
Season as needed. You can add more chili, or sugar to make it sweeter. For serving you can drizzle with coconut milk or sprinkle with fresh herbs.