Slow Cooker Barbecued Ribs

INGREDIENTS

• 1 (28 ounce) can chunky tomato sauce
• 1/3 cup brown sugar
• 2 tablespoons red wine vinegar
• 1 tablespoon chili powder
• 1 tablespoon soy sauce
• 2 teaspoons ground cumin
• 1 teaspoon paprika
• 1 teaspoon garlic powder
• 1/2 teaspoon salt
• 1 pinch cayenne pepper
• 6 pounds pork spareribs, cut into serving-size pieces