Make homemade salmon sushi rolls using a food processor. Cook sushi rice according to package instructions and let it cool. Meanwhile, blend cream cheese, soy sauce, and wasabi in the food processor until smooth. Spread the cream cheese mixture on a sheet of nori (seaweed) and top with thinly sliced salmon. Roll the nori tightly and slice into bite-sized pieces. Serve the salmon sushi rolls with soy sauce and pickled ginger.