1-2/5 oz (40g) dried shredded kombu (kelp)
1 sweet potato
Broth mixture :
1/2 cup water
1/2 tsp sugar
1/2 tsp soy sauce
a pinch of salt
- Soak kombu in water to remove sand and change water.
 - Soak kombu again.
 - Wash sweet potato in water. Cut diagonally with skin.
 - Soak sweet potato in water.
 - Put step 2 & step 4 in a pan and cover it. Cook for about 10 minutes.
 - Season with broth mixture. Simmer over low heat until the liquid is evaporated.
 - Let kombu and sweet potato absorb broth thoroughly.
 
Servings: 2
Nutrition facts Per Serving:
- 82 Calories
 - trace Fat (3.2% calories from fat)
 - 1g Protein
 - 19g Carbohydrate
 - 2g Dietary Fiber
 - 0mg Cholesterol
 - 142mg Sodium.