Slice the tofu or tempeh in thin slices. Combine the tamari or soy sauce, sriracha, maple syrup, and rice vinegar. Whisk to combine. Pour the mixture over the tofu or tempeh.
Fold the nori sheet by starting with the right or left corner of the nori sheet and fold that side to the opposite side. Do the same with the other side. Then fold the top or bottom tip of the nori sheet in the opposite direction.