Place the corned beef on the rack, lower into the pressure cooker. Add all other ingredients.
Close and lock the lid. Bring to pressure over high heat on pressure setting 2. Once at pressure (when red indicator rises). Lower heat to low. Cook under pressure for 1 hour.
Remove from heat. Quick-reduce pressure by placing under a cool running tap.
Serve with mashed potatoes, white/bechamel sauce, cabbage and carrots.
Notes
Serve cold the next day, sliced thinly, with mustard.