Portuguese Potatoes Recipe

Got this one from a friend out East. Hope this is it.

3 cups water
1 or 2 tablespoons  red wine vinegar
1 or 2 tablespoons paprika
1 teaspoon salt
1 tablespoon fresh ground pepper
1 medium onion chopped
1 chopped tomato
3 tablespoons fresh chopped parsley
4 large potatoes
1 lb. of chourico

Preheat oven to 375 degrees F. Pour water into a roasting pan. Add vinegar to taste. The water should have just a hint of vinegary taste. Sprinkle paprika over the water and mix, removing the lumps.
Add salt, pepper, onion, tomato, parsley and potatoes. Before cooking add chourico. Bake for 2 hours. Do not cover potatoes because they will steam and not roast. The potatoes will have a nice red color when they are done.