Southern-Style Barbecue Ribs

Simply delicious!  Keep in mind though that southern barbecue style has many tastes.  It can differ even from city to city.  This recipe here provides only one of the many tastes of the south.  It is really good!  :)  I served mine with mashed potatoes and baked beans.  Enjoy!
For sauce:
-1/2 cup chopped onions
-1/4 cup apple cider vinegar
-1/4 cup lemon juice
-2 Tbs margarine/butter
-1 Tbs sugar
-1 tsp ground pepper
-1/2 tsp salt
-1/4 tsp dry ground mustard
-1 1/2 tsp Worcestershire sauce
-1/2 tsp liquid smoke
For ribs:
-1 lb pork baby back ribs (cut into thirds)
-4 cups water
-1 cup vinegar
-2 tsp crushed red pepper flakes
In medium sauce pan, combine sauce ingredients.  Bring to a boil.  Cook for 10-12 minutes, or until slightly thickened, stirring occasionally.
Meanwhile, place ribs in large sauce pan.  Add water, vinegar and red pepper flakes.  Bring to a boil.  Reduce heat, cover and simmer for about 20-25 minutes.  Drain.
Brush ribs with sauce.  Place them on hot grill.  Cook for 10-20 minutes, or until ribs are brown and tender.  Brush with the sauce a couple of times.  Enjoy!