1. Prepare the sushi rice by washing it thoroughly and cooking it according to the package instructions. Once cooked, let it cool slightly. 2. While the rice is still warm, season it with a mixture of rice vinegar, sugar, and salt. Mix gently to evenly distribute the seasoning. 3. Cut the nori into thin strips, about 1 inch wide and 4 inches long. 4. Take a small amount of sushi rice and shape it into a rectangular mound, about 1 inch in length. 5. Wrap a strip of nori around the rice mound, leaving a small gap at the top. 6. Place a generous amount of fresh sea urchin on top of the rice, filling the gap left by the nori. 7. Repeat the process with the remaining rice, nori, and sea urchin. 8. Serve the Uni Gunkan sushi with soy sauce, wasabi, and pickled ginger on the side. 9. Optional: Garnish each sushi piece with thinly sliced cucumber, shiso leaves, or tobiko for added flavor and presentation. 10. Enjoy the Uni Gunkan sushi immediately for the best taste and texture.
