I have seen many recipes that ask for the ribs to be pre-cooked before finishing on the barbecue. The recipe asks that the ribs be separated and then boiled for some time. Oops…I think this method not only toughens the meat but a lot of flavour goes into that water.
I use an alternative method that keeps the ribs juicy & tender.
Place the rib racks in an oiled roasting pan, layering if necessary. Between the layers place slices of onion, salt & pepper & other seasonings that might be in the barbecue sauce such as garlic and ginger. Put approximately ¼ to ½ cup water over the ribs, cover with 2 layers of tin foil and place in a 350 F preheated oven for 40 – 45 minutes. When the ribs are removed from the oven, leave the foil on until they are ready to be finished on the barbecue.