4 whole tilapia, gutted, cleaned and descaled (ask the fish counter to do this for you)
Preheat the oven to 200oC, gas mark 6.
Place the potato, onion, nuts, maple syrup, oil and 2 tsp Cajun seasoning in a large roasting tin and toss together.
Make 3 slits in each side of the tilapia and sprinkle each fish with 1 tsp Cajun seasoning. Place the tilapia on top of the sweet potatoes and bake for 25-30 minutes or until the flesh is cooked and the potatoes are tender.