Mix rice vinegar and granulated sugar together, until the sugar dissolves
Pour the rice seasoning onto cooked sushi rice, let it absorb completely
Transfer seasoned rice to a 5” by 9” pan, loosely wrapped with saran wrap
Press the rice firmly into the pan to form a dense block
Cover rice with remaining saran wrap, place into the fridge to rest for at least 12 hours
Place into the fridge to rest for at least 12 hours
Cut rice block into 16 rectangular pieces
Place rice pieces in freezer
Mince sushi-grade salmon
Transfer minced salmon to bowl, add mayonnaise and sriracha
Mix with a spatula until well incorporated
Coat rice pieces with cornstarch
Deep-fry rice at 375°F (90.56 °C) for 2-3 mins until golden brown and crispy
Transfer the crispy rice onto a wire rack to cool
Place 1 tablespoon of the spicy salmon onto the crisp rice
Top it off with a thinly sliced jalapeño pepper