Add 1 cup water to Pressure Cooker cooking pot. Place shrimp in Steamer Basket or in bowl (w/Trivet underneath) into Pressure Cooker.
Lock on Lid and close Pressure Valve. Push Steam Button and set time for 1 minute. When Beep sounds, manually release pressure.
Remove Shrimp and place in bowl of cold water to stop cooking. Remove tails and rough chop Shrimp. Mix with Rémoulade Sauce, Hot Sauce, Celery and Pickles and place in refrigerator to chill.
Slice French Bread (or soft bun) and assemble Po Boy. Place Shredded Lettuce on Roll and fill with Shrimp Mixture. Top with Tomatoes and a dash of Hot Sauce, if desired. Squeeze on a little Lemon.
Notes
If using Fresh Raw Shrimp, set Steam and Timer to "0" minutes.Use as little Sauce as possible. The trick to any Po Boy, whether it be Shrimp, Lobster or Oyster, is to taste the Shell Fish and not have it swimming Sauce.