1. Peel the onion and garlic. Remove seeds and stem from the pepper. Cut the onion, pepper and celery into 8 pieces each.
2 Place the onion, garlic, pepper and celery in the bowl fitted with the ultrablade knife. Launch at speed 12 for 20 seconds.
3 Replace the ultrablade knife with the mixer. Scrape down the sides of the bowl and add oil. Launch the P1 simmer program for 5 minutes, without the stopper.
4 Add remaining ingredients in the order listed, except the shrimp. Replace the stopper and launch the P3 simmer program for 25 minutes or until desired doneness is achieved. With 5 minutes remaining in the cooking time, add the shrimp.