SUSHI SANDWICH - ONIGIRAZU

This rice dish resembles sushi, but it's more like a sandwich. It's convenient for kids to take to school, but usually, I don't include fish in it because it can have a strong odor, and it's not guaranteed to stay fresh for a long time, especially in hot weather at school.
This rice dish is just a "copycat" version, not the authentic Japanese Onigirazu, as I don't use Japanese rice. My Japanese friend often makes beautiful bento boxes and sushi. She says she isn't very "Japanese," but her food still turns out great. My daughter often tells me about the bento boxes of D, her daughter.
Asia, my kid, often goes to their house for lunch, and she told me D's grandparents make some kind of special sprinkles that goes really well with rice. she even claims it's the best rice dish she's ever had in her life! Oh my goodness! I was born in a rice country, and if she says that, it breaks my heart! 😿 I asked for the secret recipe from D's mom, who told me that her parents grow a type of leaf similar to shiso and dry it, then grind it with salt... I've tried planting shiso from seeds, but for 16 years, it has never sprouted. 😞 I guess I'll have to ask Asia to go to D's house and have lunch there instead! Hahahah! 😆