Clean, wash and dry fish. Sprinkle inside and out with salt.
Prepare stuffing: Saute celery and onion in quarter cup olive oil until soft. Remove from heat and combine with rest of stuffing ingredients, blending well. Stuff fish loosely. Close opening with small skewers or toothpicks. Place in well-greased baking pan. Brush with 2 tablespoon. olive oil and bake in pre-heated 350 degree oven for 40-60 minutes or until fish flakes easily with a fork. Baste occassionally with drippings while fish is baking.