2/3 c. sushi rice
2/3 c. water, plus more for rinsing
1 (2”) piece kombu (optional)
1 tbsp. unseasoned rice vinegar
2 tsp. sugar
FOR SUSHI ROLLS
2 sheets nori
2 to 4 imitation crab sticks
1 Persian cucumber, seeds removed and julienned
1/2 avocado, sliced ¼” thick
6 slices thinly sliced raw salmon (1 oz. total)
6 slices thinly sliced raw tuna (1 oz. total)
6 slices thinly sliced raw yellowtail (1 oz. total)
Soy sauce, wasabi, and pickled
1. In a medium bowl, cover rice with cold water. Swirl rice with your fingers to release starches, then drain. Repeat process about 3 more times until water is mostly clear. Fill bowl with cold water again and soak rice 30 minutes before draining well.
2. In a rice cooker or medium saucepan, combine soaked rice, ⅔ cup water, and kombu, if using.
3. If using rice cooker, cook on sushi rice or white rice setting. If using saucepan, bring to a boil over high heat. Cover, reduce heat to low, and simmer until rice is cooked through, 12 to 15 minutes. Remove from heat and let steam, covered, until rice is swollen and fluffy, about 10 minutes. Discard kombu.
4. Spread rice on a small baking sheet or 13"-by-9" baking dish. In a small bowl, whisk vinegar, sugar, and salt until sugar is dissolved, then drizzle over rice. Using a wooden spoon or rice paddle, quickly fold vinegar mixture into rice. (Don’t mix too much or rice will get sticky!) Smooth rice in an even layer and let cool about 30 minutes.
ASSEMBLE SUSHI ROLLS
1. On a bamboo sushi mat, arrange 1 nori sheet shiny-side up. Using wet fingertips, spread about 1 cup rice over surface of nori.
2. Lay a piece of plastic wrap over entire bamboo mat, covering nori and rice. Place one palm on top of plastic, centered over nori and rice. Slide your other hand under bamboo mat and flip so plastic is on work surface. Lay mat back down on surface, then slide plastic onto mat (seeds should be facing down now). Pull edges of plastic to make sure they’re covering mat.
3. Set 1 or 2 pieces of crab stick, depending on size, to cover long edge closest to you. Place half of cucumber and avocado slices next to crab.
4. Use bamboo mat to roll nori over fillings, touching down on uncovered nori. Lift bamboo mat so it doesn’t get stuck inside roll, then continue rolling up to reach far edge of nori.
5. Use mat to gently pinch and press roll to make sure it’s tight, then unroll bamboo mat and plastic. Repeat with remaining nori, rice, crab, cucumber, and avocado.
6. Drape alternating slices of salmon, tuna, and yellowtail over top of rolls. Set a piece of plastic wrap over each roll and gently press to mold fish to sides. Cut each roll into 8 pieces. Serve immediately with soy sauce, wasabi, and ginger.