chinese style spare ribs

Preheat oven to 325°. Line a rimmed baking sheet with foil. In a food processor, pulse ketchup, hoisin, sambal oelek, vinegar, scallions, and ginger until smooth, scraping down the sides as necessary. Season ribs with salt and coat both sides with sauce. Roast, bone side down, until ribs are tender but not falling off the bone, about 1 1/2 to 2 hours. Cut into single ribs and serve with slaw.