Surf Clam Recipe
spicy mentaiko
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Ingredients
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Hand Roll Components
Spicy Mentaiko Mayo (if making from scratch)
Method
Prepare Rice & Nori
Season rice
If your sushi rice is not yet seasoned, combine 3 cups cooked short-grain rice with sushi vinegar (about 4 tbs rice vinegar, 1 tbs sugar, 1 tsp salt warmed to dissolve) and fold gently. Let cool to near room temperature, covering with a damp towel to keep moist. This recipe assumes 3 cups cooked, seasoned rice.
Arrange nori sheets on a clean work surface, shiny side down. Have a small bowl of water nearby to wet your fingers so rice won't stick.
Make Spicy Mentaiko Mayo (if not using pre-made)
Prepare mentaiko: using a small knife, slice the mentaiko sacs and scrape the roe into a bowl, discarding the membranous casings.
Mix: combine the scraped mentaiko (from 2 sacs) with 4 tbs mayonnaise, 1 tsp lemon juice and 1 tsp sake (optional). Taste and add up to 1/2 tsp shichimi togarashi for extra heat. Adjust salt/acid to taste. Transfer 3 tbs to the hand-roll component; reserve any extra in the fridge for other uses.
Assemble Surf Clam Hand Rolls
Portion rice: wet your fingers and place about 1/2 cup seasoned sushi rice onto the lower-left quadrant of each nori sheet, forming an even, compact oval. Use about 3 cups total rice to make 6 hand rolls (approx 1/2 cup each).
Add surf clam: arrange two pieces of chilled surf clam (hokkigai) on top of the rice/cucumber so the clam’s tapered ends extend slightly from the future cone opening for presentation. Each nori sheet uses 2 clam pieces (12 pieces total).
Sauce: drizzle or dot about 1/2 tablespoon of spicy mentaiko mayo over the surf clam on each roll. If you made extra mentaiko mayo, keep refrigerated and use within 2–3 days.
Garnish: sprinkle each roll with a pinch of toasted sesame seeds and some thinly sliced green onion.
Form cones: fold the bottom-left corner of the nori up and over the filling, then roll the sheet into a cone shape, sealing the edge with a little water or a thin smear of mayo so it holds. The clam tips should peek out of the wide end of the cone.
Repeat for remaining nori sheets and ingredients until you have 6 hand rolls.
To Serve
Serve immediately so nori remains crisp. Offer soy sauce and pickled ginger on the side. Hand rolls are best eaten within 10–15 minutes of assembly.
Storage: leftover rice and mentaiko mayo can be refrigerated for up to 2 days; do not preassemble hand rolls in advance as nori will become soggy.