Saute celery and onions in vegetable oil until tender.
Add shrimp and saute 3 minutes until pink. Drain from oil. Add shrimp mixture to slow-cooker.
Cook on high for 2 hours. You may cut shrimp into smaller pieces before adding to liquids, if desired.
VARIATION: Instead of slow cooker or crock pot, cook in a large pot on stove top. Bring to boil, simmer 30 minutes.