Line the bottom of the crockpot with corn husks, banana leaves, or ti leaves.
Place the pork shoulder on top of the leaves.
In a small bowl, combine the Hawaiian salt, soy sauce, Worcestershire sauce, garlic, and liquid smoke.
Pour the sauce on top of the pork, rubbing it into the meat.
Cover the top of the pork with more husks (or leaves). Place the cover on the crockpot and turn on to the low setting. Slow cook the pork for 6 hours or until the internal temperature is 205℉.
Once the pork is finished cooking, remove from the crockpot and shred with two forks in a large bowl. Discard any large fatty pieces. Pour any juice from the crockpot over the top of the shredded pork. Cover and allow to cool slightly.
Preheat the oven to 400℉.
Slice the zucchini lengthwise and scoop out the seeds. Salt the zucchini and wait 15 minutes to draw out the water from the zucchini.
Place the zucchini on a sheet pan and dab off the excess water.
Bake the zucchini for 15 minutes.
Remove the zucchini from the oven and fill each boat with the shredded pork. Place one pineapple ring on each boat.
Return the filled boats to the oven and bake again for 10 minutes.
After the second bake, remove from the oven and top each boat with sliced radishes and green onions. Serve immediately.