1. Lay sliced onion on the bottom of a pan.
2. Rub both sides of the brisket with oil.
3. In a small bowl, mix sugar and spices together. Rub on both sides of the brisket. Place meat in the pan.
4. In a small bowl, combine wine, soy sauce, honey, and liquid smoke. Pour around the meat.
5. Cover tightly and bake at 325 degrees Fahrenheit for four hours and 30 minutes, flipping the meat after two hours.
6. Shred, or cool and slice.