Place cauliflower rice in a bowl and cover with cling wrap. Microwave for 6 minutes, stirring halfway through. Add and mix through rice wine vinegar. Set aside to cool.
Make marinade, prep salmon and add to marinade. Mix through and set aside while you prep other ingredients.
Add white and black sesame seeds to cauliflower rice and mix through. Place cauliflower rice in a serving bowl. Top with cucumber, radish, cream cheese and salmon. If using, finish with nori and sliced shallots.