This is a cookout favorite at our house! The two step cooking process permits massive quantities of ribs to be pre-cooked ahead of time, and then grilled just prior to serving!
The above grilling procedure may seem overly involved and complicated. Perhaps it is. But it's the technique that I've developed after years of research on dozens upon dozens of slabs of ribs, and it works consistently and flawlessly for me! Of course, your mileage may vary.