Instructions. 1  Trim pork loin.Cut into about 2-inch slices cross grain. 2  Chop onion. Add to the cake pan. 3  Add spices to the onion. Add broth and liquid smoke.  Add pork slices. It may not be entirely 1  submerged. Seal with aluminum foil and place in 300-degree oven for 2 1/2 hours give of take a little. I did not preheat.  Remove from over.