Rockfish in Spinach

1 1/2 lb. Alaskan Rockfish fillets 2 10-ounce Package frozen chopped spinach 1 cup sour cream 1 medium onion, chopped 1 1/2 tablespoons flour 2 tablespoons lemon juice 1/4 pound mushrooms, sliced paprika Preparation Instructions 1. Preheat oven to 375.