Cut the spareribs into serving size pieces, about 1 or 2 ribs per piece. Season both sides with salt and pepper. Place on an aluminum foil lined baking sheet.
Cook for 30 to 45 minutes until ribs obtain a light golden brown color.
Remove from oven and transfer to a large slow cooker. Layer the ribs adding barbecue sauce to each layer as you place them in the cooker. When filled, place the cover on the slow cooker and turn it to the lowest heat setting.
Cook for approximately 6 hours, stirring ribs and sauce once during the cooking time.