1 corned beef, 3-4 pounds - soaked in cold water for about 10 minutes, rinsed and patted dry.
This corned beef came with spices/peppercorns. Line shallow baking dish with enough foil to seal the beef. Sprinkle half the spices on the foil, add one sliced orange, 3-4 cloves of garlic and a couple of stalks of celery. Place beef on top and top off with the other half of the spices, another sliced orange, more garlic and celery.
Seal beef and spices and bake at 325 degrees for 4 hours. Internal temp 160 degrees means it's done. Let it cool slighlty and trim the fat. Slice and serve, or slice for sandwiches later.