Prepare the sushi rice by tossing cooked rice with rice vinegar and sea salt until well combined.
Slice the sushi-grade salmon into long, thin strips approximately half an inch thick.
Julienne the cucumber into matchsticks and slice the avocado into thin wedges.
Place a sheet of nori on a bamboo rolling mat and spread half the rice evenly, leaving an inch at the top.
Layer half of the salmon, cucumber, and avocado across the center of the rice.
Roll tightly using the mat, wetting the top edge of the nori with a little water to seal the roll.
Repeat the process with the second nori sheet and the remaining ingredients.
In a small bowl, whisk together the coconut aminos, lime juice, and grated ginger to create the dipping sauce.
Slice each roll into 8 pieces using a sharp, wet knife and sprinkle with sesame seeds before serving.