Sure, making sushi at home can be a little time consuming, but this is one of our favorite things to do when we have a group over. Buy a few mats, make a bunch of rice, and get rolling! Saké (Japanese rice wine) is a nice addition too.
For the sushi roll: Lay a pieces of nori on the sushi mat. Spread the sushi rice over the nori in an even layer. Place the salmon horizontally over the bottom third of the sheet, about 1 inch from the edge. Top with scallions and any add-ons you choose. Roll up tightly and cut into 1 inch pieces using a very sharp, moist knife (this helps cut the nori easily). Garnish with the spicy mayo.
Here is a great video on how to roll sushi. Now, get rolling!