Step 1:In a medium-sized, heat-resistant, non-metallic skillet. melt butter in Microwave Oven 30 seconds. Add chopped onion and heat, uncovered, in Microwave Oven 3 minutes, or until onion is soft.

Step 2:Add tarragon leaves and mushrooms to onions and heat. covered, in Microwave Oven 3 minutes.

Step 3:In a small bowl, combine sour cream, light cream, paprika. salt and flour. Add to onion-mushroom mixture. Heat, uncovered. 2 minutes in Microwave Oven. Stir. Heat, uncovered, an additional minute in Microwave Oven.

Step 4:In a buttered, 3-quart, heat-resistant, non-metallic baking dish, pour half of the mushroom sauce. Arrange fillets on top. Spoon remaining mushroom sauce over fish. Sprinkle with parsley flakes. 5. Heat, uncovered, in Microwave Oven 7 minutes, or until fish flakes easily with a fork.

Step 1:Make a frying pan very hot, barely smear it with fat and fry the fish briefly, one or two at a time, just long enough to brown their skins well on both sides. Transfer the fish to the ovenproof dish, arranging them neatly. Cover and store in a cool place.

Step 2:Chop the herbs and mix them gently in a small saucepan. Measure the yogurt and cream and pour them over the herbs. Add plenty of pepper and some salt and stir to mix well. Cover and leave to infuse.

Step 3:About 1/2 hour before you plan to serve the trout, bring the yogurt-and- herb mixture very slowly to simmering point, stirring all the while. Pour mixture over the fish, cover the dish and bake at 350 F (180 C) gas mark 4 for 20-25 minutes until the fish are piping hot and cooked through