Slow Baked Spare Ribs

This was a baby back rib recipe that I modified.  Chris likes spare ribs and I don't particularly, but they are all that were in stock w/our local farmer so spare ribs it is!  They are fattier than I would prefer but I couldn't deny these were SO good.  So take a smaller portion and enjoy :)

Ingredients
~1-2 lbs spare ribs
1 large onion, cut
1/2 cup ketchup
1/2 cup water
1/4 cup apple cider vinegar
3 tbsp brown sugar
1/4 tsp salt

Preheat oven to 350 deg F.
Mix all ingredients in measuring cup.  Place 1/2 of the onion pieces in the bottom of a large baking dish, cover with ribs, and add the rest of the onions.  Pour sauce to cover, place glass lid on the dish, and bake at 350 for 2-3 hours.  Ribs will be falling apart!!