Bbq pork spare ribs

Ingredients

• 6 libras of Pork spare ribs (2 slabs)
• 3 tablespoons of brown sugar
• 1/2 teaspoons of salt
• 1 1/2 teaspoons celery salt
• 1 teaspoons of pepper
• 1 teaspoons of paprika
• 1 teaspoon of cumin
• 1 teaspoon of chili powder
• 2 teaspoons of onion powder
• 1/2 cup of Barbecue Sauce (recipe follows), plus more for serving

Roasted Chile Barbecue Sauce:

• 2 anaheim chilis
• 2 jalapeños
• 1 1/2 cups of tomato puree
• 1 cup of ketchup
• 3 cloves of garlic
• 1 tablepsoon of Worcestershire sauce
• 1/3 cup of white wine vinegar
• 1 heaping tbsp of tomato paste
• 1/2 cup of molasses
• 1/4 teaspoon of salt