Wash the sushi rice and let it stand for in water for 15 mins.
Then transfer to a pot, add the water, bring to the boil and then reduce to a simmer for 15 mins. Switch off the heat and let the rice stand covered for another 15 mins, before leaving to cool completely.
In a small bowl mix together the rice wine vinegar, the maple syrup and the mirin.
Add 3 tbsp of the sauce mix to the rice and stir till well combined. You can add more sauce if you wish.
Then steam the veggies according to the packet instructions and let cool. Drain any excess moisture from the veggies before mixing them with the rice.
Set out two 6 cups donut silicon trays and divide the vegetable sushi mixture equally between these, stuffing the rice to form a doughnut shape.
When done carefully invert the doughnut trays to remove your sushi doughnuts, top them with extras to your taste and serve.