First, prep meat the night before you are going to cook it. You should always wash the meat and place ribs in a roasting pan. Put the sauce all over them. Then, sprinkle ribs with tenderizer, and sprinkle the rest of the spices all over the ribs. Cover and seal with foil, then let marinate overnight in the refrigerator. Heat the oven to 325 degrees and bake four to five hours. Add the remaining BBQ sauce to the ribs and let them cook for one more hour without the foil, then you're ready to serve them.