Cod, snapper, halibut, salmon, etc.
Salt
Pepper
Lemon juice
1/2 c. sour cream
1/2 c. mayonnaise
1/2 c. onions, minced
1/2 c. celery, diced

Place fish one layer deep in greased shallow baking pan. Sprinkle with salt, pepper and lemon juice. Mix sour cream and mayonnaise, then add onion and celery. Spread over fish and let stand one hour. Bake in 400 degree oven for 30 minutes.