Sticky Spicy Ribs

Name: Sticky Spicy Ribs
Ingredients: 2 tablespoons packed dark brown sugar; 1 1/2 teaspoons salt; 2 tablespoons paprika (not hot); 1 1/2 teaspoons chipotle chile powder; 1 1/2 teaspoons ground cumin; 1 teaspoon ground allspice; 1/2 teaspoon black pepper; 2 (2-lb) racks baby back ribs; 1 1/2 cups chopped onion (from 1 large); 6 garlic cloves, finely chopped; 1 1/2 tablespoons finely chopped peeled fresh ginger; 2 tablespoons vegetable oil; 1 1/2 cups ketchup; 1/2 cup cider vinegar; 6 tablespoons soy sauce; 1/2 cup water; 1/4 cup packed dark brown sugar; 3/4 teaspoon black pepper