Chop lemongrass, and bruise it with the flat of a cleaver. Add Laos powder and lemongrass to coconut milk, and slowly bring to a boil while stirring gently. Simmer for 10 minutes. Strain off lemongrass. Add tofu, stirring into stock. Remove 2 cups of stock. Dissolve miso in it, and return to pot. Simmer for 5 minutes. Add tofu, stirring into stock. Remove 2 cups of stock. Dissolve miso in it, and return to pot. Simmer for 5 minutes. Add remaining ingredients, and serve garnished with coriander. This is delicious with a bowl of Thai jasmine rice. John Paino & Lisa Messinger, "The Tofu Book"