Combine the salt, pepper, garlic powder, paprika, and sugar and mix thoroughly.
Take the slab of ribs and rub the seasoning mix in on both sides, making sure every surface is covered.
Wrap the ribs tightly in foil like a package, place on a baking sheet, and bake at 250°F for 3 hours.
While the ribs cook, combine the dark soy sauce, light soy sauce, garlic, oyster sauce, hoisin sauce, and brown sugar, and mix thoroughly.
Remove the ribs from the oven and open the foil. Brush the glaze on both sides, then return to the oven at 400°F for about 8 minutes, or until the glaze is caramelized.
Slice the ribs and place on a plate. Optionally garnish with sesame seeds and scallions. But it's your food, you eat it how you like.