The broth is important for good taste. The taste is much better if you use broth for stew and soup instead of water.
Some thin soy sauce and sweet sake makes the rolled omelet tasty. The broth spreads in your mouth when you eat.
Sushi rolls with your favorable fillings are suitable for a party. The mild sourness of sushi rice is also good for a salad sushi roll if you use lettuce leaves instead of dried seaweed.