The Prep Time does not include time to soak dried wake seaweed.
1. Wakame is different from nori seaweed so please do not get them mixed up. Nori seaweed is sold in a rectangular black sheet and is used for sushi rolls. You may find non-cut dried wakame. In this case, you just have to cut it into small pieces after you've rehydrated.
2. I used dashi seasoning to make dashi. Refer to the packet instructions for the ratio of powder and water. I used boiled water so that the powder dilutes easily, then cooled it down completely.
If you would like to make dashi from scratch, please refer to the link on the ingredient which includes vegetarian dashi.
3. If you leave the cucumber and wakame in the dressing too long before serving, it will lose the fresh colour of the ingredients. So only dress just before serving. You could serve the sunomono in a bowl to share or in small bowls as an individual serving.