Kombu is the Miracle Kelp
Kombu is edible kelp. It is used extensively in Japanese cooking as one of the three main ingredients needed to make dashi, a soup stock. You can get it at Japanese grocery stores, also recently I found it at a Ralph’s! It looks like this.

kombu, kombu, kelp
Since it’s not an animal product, it makes good vegan stock.
If you keep it in a Ziploc bag, it will last at least 1 year. Sometimes you see some white powdery stuff on the surface. It’s not mold or anything toxic. Just wipe the powder lightly with a clean cloth and use it.
For busy people, they sell kombu stock powder.You can just put the powder in hot water, and it makes tasty broth. You can find it at Japanese grocery stores.
