Sushi stuffing is a combination of ingredients used to fill sushi rolls. The three main components are RICE, SEAFOOD, and EEL, which can be represented by the crossword solutions RICE (4 letters), SEAFOOD (7 letters), and EEL (3 letters). RICE is usually cooked and seasoned with vinegar, sugar, and salt, while SEAFOOD and EEL are typically raw. Other ingredients such as vegetables, eggs, and pickled ginger may also be added to the stuffing.