Lightly sprinkle one side of the fish fillets with cajun seasoning.
Heat a non-stick frying pan over high heat and add half the oil. Cook the fish for 2-3 minutes on each side. Remove from the heat and set aside to rest.
Cook the brown rice noodles as per the packet directions. Drain and set aside.
To make the dressing, combine the sugar and white balsamic vinegar in a small container.
Combine the dressing, noodles, lettuce, fennel, chives, mint and orange slices and the remaining oil and toss to combine.
Divide the noodle salad over 4 plates and top with a fillet of fish. Serve and enjoy!