Chop the cauliflower into florets. Place them in a food processor and pulse until the pieces resemble rice, being careful not to over-process.
Transfer the processed cauliflower to a steamer and cook for about 5-7 minutes until tender, or microwave in a covered dish for 3-4 minutes. Let cool slightly.
In a mixing bowl, combine the cooked cauliflower rice with salt, white vinegar, and sugar-free powdered sugar. Stir well until slightly sticky.
Lay a sheet of nori on a bamboo sushi mat or clean cutting board, shiny side down. Wet your hands to prevent sticking and grab a handful of the cauliflower mixture.
Spread the cauliflower mixture evenly over the nori, leaving about an inch at the top edge. Layer sushi-grade salmon or other protein and cucumber strips on top.
Using the sushi mat, carefully roll the nori away from you, pressing gently to keep it tight. Slice the sushi into bite-sized pieces with a sharp knife.
Sprinkle sesame seeds on top for garnish. Serve with mayonnaise and wasabi on the side, if desired.
Equipment
Food Processor
Steamer
Microwave
Mixing Bowl
Sushi Mat (Bamboo Mat)
Knife
Notes
Use a sharp knife wetted between cuts to prevent the sushi from tearing.
Store unrolled ingredients separately in airtight containers to maintain freshness.
Customize fillings with shrimp, crab, or tofu for variety.
Do not overcook cauliflower to keep the sushi rice texture.