Clean, wash and dry fish. Sprinkle inside and out with salt.
Prepare stuffing: Saute celery and onion in 1/4 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 tbsp. 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.