Prepare the Ribs
Remove the silver skin from the back of the ribs for a more tender texture.
Season the ribs generously with salt and pepper on both sides.
Make the Sauce
In a mixing bowl, whisk together pineapple juice, soy sauce, brown sugar, garlic, ginger, ketchup, and rice vinegar until fully combined.
Layer the Ribs in the Slow Cooker
Place the seasoned ribs in your slow cooker. If needed, cut them into smaller sections to fit.
Pour the sauce over the ribs, ensuring they are well-coated.
Cook Low and Slow
Cover the slow cooker with its lid and cook on low for 6–8 hours or high for 3–4 hours, until the ribs are tender and the meat easily pulls away from the bone.
Thicken the Sauce (Optional)
Once the ribs are cooked, transfer them to a foil-lined baking sheet.
Pour the sauce from the slow cooker into a saucepan and bring it to a simmer. Mix 1 tablespoon of cornstarch with 2 tablespoons of water to create a slurry, then stir it into the sauce. Simmer for 2–3 minutes until thickened.
Broil for Extra Flavor
Brush the thickened sauce over the ribs and broil them in the oven for 3–5 minutes to caramelize the glaze.
Garnish and Serve
Sprinkle the ribs with chopped green onions and sesame seeds for garnish. Serve hot with extra sauce on the side.