Korean bbq mushroom onigiri

water 51.6% , rice 24.2% , rice vinegar 12.1% , sunflower oil 6.1% , tapioca syrup 3.0% , cane sugar 1.5% , carrot 0.8% , mushroom 0.4% , apple puree 0.2% , red bell pepper 0.1% , black sesame 0.0% , spring onion 0.0% , sea salt 0.0% , quinoa 0.0% , soya bean 0.0% , ginger 0.0% , E425 0.0% , potato starch 0.0% , alcohol 0.0% , distilled vinegar 0.0% , pea protein 0.0% , garlic 0.0% , sesame oil 0.0% , E415 0.0% , E270 0.0% , chickpea 0.0% , black pepper 0.0% , koji 0.0% , yeast extract 0.0% , natural flavouring 0.0% , torula yeast 0.0% , turmeric 0.0%