My first taste of kombu tsukudani was as a university student in San Francisco. My roommates were Japanese (hi Sanae!) and we’d often head to Nijiya Market in Japantown to do our grocery shopping. The first time I tasted this kelp relish, I fell in love with the salty, slightly-sweet, oceany flavor.
This tastes perfect on top of rice or as a filling in onigiri, but I also like it eat it by itself. If you make homemade dashi and find yourself with lots of leftover pieces of kombu seaweed, this is a perfect use. I like to add enoki mushrooms to the the mix for a textural contrast, but it tastes just as good without.
About 50 square inches kombu, leftover from making dashi stock (or equivalent amount soaked in cold water for 20 minutes)
3 tablespoons rice vinegar
1 teaspoon sugar
1 tablespoon sake
3 teaspoons mirin
5 tablespoons soy sauce
1 cup enoki mushrooms, trimmed and cut into 1-inch lengths
1. Slice the kombu into narrow strips 1 1/2 inches long. In a saucepan, bring 2 cups of water to a boil and add the vinegar. The vinegar helps tenderize the kombu and eliminate bacteria.
2. Reduce the heat to maintain a simmer and cook the kombu for about 8 minutes. Test for doneness by pinching a strip of kombu: it should yield easily. If it does not, continue cooking for another 5 minutes. Drain under cold water and rinse.
3. Rinse and dry the saucepan and add the sugar, sake, mirin, and soy sauce. Bring to a simmer over low heat and add the kombu. Simmer for 4 minutes and add the mushrooms. Cook over low heat for 5 minutes, stirring often to not let the liquid scorch.
4. When the kombu looks glazed and the liquid has mostly reduced, remove the pan from the heat, let cool to room temperature, and serve.