Spicy Oven Baked Ribs

I am calling these "spicy" since I already have another oven baked ribs recipe. These were really good and a cinch to put together. I should have taken an "after" picture--a bunch of teenagers with sauce all over their chins!!

Spicy Oven Baked Ribs

4 lbs meaty ribs (used bone in)
1 onion, sliced (2 if you prefer)
4 tsp apple cider vinegar
4 tsp Worcestershire sauce
2 tsp salt
2 tsp paprika
1 tsp ground red pepper (this was enough for me; if you want them "spicy", you can amp this up)
1 tsp black pepper
2 tsp chili powder
1 1/2 cups ketchup
1 1/2 cups water

Sprinkle ribs with salt and pepper. Place in roaster and cover with onions. Combine remaining ingredients and pour half of the sauce over the meat.
Cover and bake at 350 for about 1 hour, basting two times during the cooking process. Turn the ribs twice during cooking process as well. Remove cover for the last few minutes to brown ribs, if desired.

adapted from a recipe seen on cooks.com