01 - Rinse sushi rice under cold water until water runs clear. Combine rice and water in a saucepan, bring to a boil, cover, and simmer for 15 minutes. Remove from heat, keep covered, and let stand for 10 minutes. Dissolve sugar and salt in rice vinegar. Fluff rice with a fork and thoroughly incorporate the vinegar mixture. Cool to room temperature before assembling.
02 - While rice cools, slice prosciutto into manageable strips. Cut fresh mozzarella into thin sticks. Julienne the roasted red bell pepper and sun-dried tomatoes. Wash and dry fresh basil leaves and arugula. Keep all components separated and ready for assembly.
03 - Place a nori sheet on a bamboo sushi mat with shiny side facing down. Moisten hands and spread an even, thin layer of sushi rice over the nori, leaving a ¾-inch border at the top edge. Arrange prosciutto, mozzarella strips, roasted peppers, sun-dried tomatoes, arugula, and basil in a horizontal line along the bottom third of the rice. Drizzle with olive oil and sprinkle with black pepper.
04 - Using the bamboo mat, roll the sushi tightly away from you, applying gentle pressure to maintain compact shape. Seal the edge with a small amount of water. Repeat process with remaining ingredients. Using a sharp, damp knife, slice each roll into 6 equal pieces, wiping the blade clean between cuts.
05 - Arrange sushi pieces on a serving platter. Optionally drizzle with balsamic glaze and add fresh basil leaves as garnish. Serve immediately while rice remains at room temperature for optimal texture and flavor.