Thoroughly rinse the rice until the water runs clear.
Put the rice into a pot, add the water and bring to a boil. When it starts boiling, cook for 10 more minutes and then remove from heat and cover the pot with a lid. Let the rice absorb all the liquid.
Let the rice thoroughly cool.
Mix vinegar, sugar, and salt until dissolved and pour into the rice. Mix well.
Prepare the veggies and cut them into strips.
Use a sushi mat and cover it with some plastic wrap.
Place the nori sheet on the sushi mat, with the rough side facing up. Apply the rice to the nori sheet, covering all edges. It should be 1/2" thick and leave the top 1" of the Nori sheet bare.
Layer the veggies on the bottom and carefully roll them.