Using a potato peeler, peel carrots and cucumbers to make thin slices and put in a bowl. Then add ponzu sauce and mix so that veggies are coated with sauce.
Heat a sauté pan and wipe with Olive Oil or spray non-stick spray. You want to get a good and quick sear on the fish so make sure the pan is hot! Throw your fish in the pan and add sesame oil and soy sauce. Lightly sear so that fish remains rare on the inside. You will literally cook in pan for approximately 2 minutes if that! Remove from heat.
Now comes the fun part. Building the tacos! Take your tortilla and line the fish as your first layer. Next add cucumbers and carrots followed by slices of avocado. Add cilantro and top with sriracha and green onion! I always like to add a little extra ponzu right on to the taco as well.