Place fish in an oiled, large ovenproof dish (12-cup capacity) and sprinkle with flour seasoned with salt and pepper and toss to coat and then arrange in a single layer and then pour over sauce mixture.

Step 3

Cook, uncovered, in a hot oven (200C) for 35 minutes.

Step 4

Meanwhile, make topping by spreading fries evenly over a large oven tray.

Step 5

Cook in same hot oven, turning halfway for about 30 minutes, or until golden brown.

Step 6

Remove and transfer to a large bowl and add parmesan and toss to coat.

Step 7

Remove fish from oven and arrange topping over fish and return to oven.

Step 8

Cook for a further 10 minutes, or until topping is golden and crisp and then remove and stand for 5 minutes before serving.

Step 9

TIP - They used Heinz Four Cheese Lasagne Sauce for this recipe. Thick white fish fillets, such as ling, are best as they retain their shape during cooking.