What did Columbus name the island (today a part of the Bahamas) where he first landed? - 674927
One advantage boiling has over straight grilling is cooking time. With a 45-minute to one-hour boil first, the spareribs will tenderize in the boil and need only go onto the grill to sear and caramelize on their exterior-- a process that only takes about 10 to 15 minutes, per side, over a medium-hot grill.
Ribs cooked on a grill, especially a gas grill, will not be as tender even cooked indirectly. To make your ribs tenderer you can precook by either boiling the ribs for about 30 minutes or by placing them in a slow cooker.