Saute 1 small chopped onion in 1-2 T oil, add some garlic if desired.

Add:
1/2 c water
2 T vinegar
1 T worcestershire sauce
1/4 c lemon juice
2 T brown sugar
1 c. chili sauce
Simmer 20 minutes.

Place ribs in greased pan lined with foil.  Cover with above.  Cover pan.  Bake 20-30 minutes at 450.  Uncover, lower heat to 350, bake an hour, turning and basting every 15 minutes or so.