In saucepan, melt butter; add onion and cook on low heat 4 minutes. Add mushrooms and cook on medium-high heat. Stir frequently, and cook until moisture has evaporated. Add sprinkle of salt and pepper. Divide fish into 4 servings; sprinkling both sides with salt and pepper. With skin side down, squeeze lemon juice generously all over fish. Sprinkle parsley evenly over all. Cut or tear paper or foil into 14x10-inch pieces. Coat center of each piece generously with butter or margarine. Put fish in the center of each piece. Sprinkle mushrooms on top of all pieces. Fold paper over fish and fold across center, drugstore style. Turn ends up twice. Set packages on oven rack in preheated 400-degree oven for 12-14 minutes. If using parchment paper, the fish is served in the paper, which is cut open. If using foil, remove foil before serving fish. Fish wrapped in parchment paper can also be cooked in the microwave. But dont do it with foil-wrapped fish. Put two packages of fish on a microwave safe place and microwave on high for 6 minutes. Repeat with other packets. Let stand 1 minute before cutting open to serve. MEMPHIS COMMERCIAL APPEAL FOOD SECTION From a collection of my mothers (Judy Hosey) recipe box which contained lots of her favorite recipes, clippings, etc. Downloaded from Glens MM Recipe Archive, G Internet.