Step 1

Preheat oven to 300 degrees F (150 degrees C). Place ribs on a rack in a shallow roasting pan. Scatter 4 cloves of sliced garlic over ribs. Cover, and bake for 2 1/2 hours. Cool slightly.

Step 2

In a small bowl, mix together white sugar, paprika, salt, black pepper, chili powder, and ground cumin. Rub spices over cooled ribs. Cover, and refrigerate overnight.

Step 3

In a small saucepan, mix together brown sugar, cider vinegar, ketchup, chili sauce, Worcestershire sauce, lemon juice, onion, dry mustard, and 1 clove garlic. Simmer over medium-low heat, uncovered, for 1 hour. Reserve a small amount for basting; the remainder is a dipping sauce.

Step 4

Preheat grill for medium heat.

Step 5

Place ribs on grill. Grill, covered, for about 12 minutes, basting with the reserved sauce, until nicely browned and glazed. Serve with remaining sauce for dipping.