Preheat oven to 325 degrees. Parboil ribs by placing in a large pot filled with beer and water. Add 1 onion and peppercorns. Bring to a boil and let simmer for 5 minutes. In medium sized saucepan heat oil, 1 chopped onion, and garlic. Cook until onions become translucent. Add vinegar, ketchup, molasses, lemon juice and a dash of Worcestershire sauce. Season with pepper and a Tabasco sauce. Bring to a simmer. Remove ribs from pot and brush on sauce. Place in roasting pan and roast in oven for 1 to 1 1/2 hours.