Combine rice and water in a medium cooking poat and bring to a boil.
Turn the heat down to medium high and cook for 10-12 minutes, stirring occasionally, until rice is fully cooked.
Remove heat and add wasabi and rice vinegar to cooked rice.
Stir or whisk vigorously until thoroughly combined.
Cut up carrots into vertical slices.
Cut up avocado into slices.
Lay down a sheet of seaweed vertically on a sushi mat or hand towel.
For the hand towel, fold it in half lengthwise and over it with plastic wrap
Make a flat layer of rice on the seaweed like a sheet over a mattress, 1/2 the cooked rice in one roll, 1/2 in the other roll.
If you want the rice ont he outside instead of the inside of the sushi roll, flip the seaweed over at this point.
Line the carrots and avocado on the closest edge of teh seaweed to you, horizontally.
Roll it up using the towel to guide the process.
Sprinkle the top with sesame seeds.
Cut into slices and enjoy immediately.