Place the ribs in a large pot, cover with cold water and add the salt, carrot, celery, onion, garlic and ginger. Bring the ribs to a boil, reduce the heat and simmer until the ribs are very tender but not completely falling off the bone, about 45 minutes.
While ribs are cooking, make the sauce. Combine the pineapple juice, chicken stock, brown sugar, hoisin, soy sauce, garlic, ginger, chile, Worcestershire sauce and 1 of the green onions in a large saucepan. Bring to a boil, reduce the heat and simmer until thickened.
Heat a grill or grill pan over medium-high heat.
Drain the ribs and discard the vegetables and ginger. Spray a baking sheet with cooking spray. Place the ribs on the baking sheet and brush them with oil.
Brush the sauce on the ribs and grill, brushing on more sauce occasionally, until heated through, 2 to 3 minutes per side. Transfer the ribs to a platter, brush once more with the sauce, scatter with the remaining green onion and serve.
This recipe was created by a contestant during a cooking competition. It has not been tested for home use.