In a medium bowl, whisk together the vinegar, stevia, and sea salt. Add the cooked rice and stir gently. Let it sit to absorb the flavors.
On a dry surface, make two stacks of three sheets of nori each. Using a knife or pizza cutter, slice each stack into eight equal squares (keep the nori dry so it stays crisp).
Top each square with about 1 tablespoon of the seasoned rice and press gently. Add a slice or two of avocado, your chosen veggies, and a pinch of furikake. Drizzle with coconut amino acids and add a dab of wasabi for a spicy kick, if desired.