How to Make It
Place uncooked sushi rice in a fine-mesh sieve. Rinse under cold water, stirring rice until water runs clear (about 30 seconds). Combine rice, water, and salt in a small saucepan. Bring to a boil; cover, reduce heat, and simmer 15 minutes. Remove from heat; let stand 10 minutes. Uncover and fluff rice. Stir in cashews, green onions, cilantro, serrano pepper, and vinegar.