Rum Glazed Ribs

Prep : 1-1/2 hours     Grill : 15 minutes  (optional)

6           pounds pork spareribs  , cut into serving size pieces 
2           cans (8 ounces each) tomato sauce 
1           cup dark rum 
1           cup honey 
1           cup red wine vinegar 
1           small onion , finely chopped 
1           tablespoon Worcestershire  sauce 
2           garlic cloves , minced 
1/2        teaspoon salt 
1/2        teaspoon pepper 

1 .      Place ribs in two un-greased 13-inch x 9-inch baking pans . Cover and bake at 350* for 1-1/2 to 2 hours  or until meat is tender .
2 .       Meanwhile , in a large saucepan , combine  the remaining  ingredients  . Bring  to a boil . Reduce  heat ; simmer  uncovered  , for 15 to 20 minutes  or until slightly thickened .
3 .       Drain  ribs  and discard cooking liquid  . Moisten a paper towel  with cooking oil  ; using long-handled tongs  , lightly coat  the grill rack  . Brush half  of the sauce  over the ribs  . Grill the ribs cover over medium heat  for 15 to 20 minutes  or browned  , turning and basting  occasionally with remaining sauce .