Peel the potato and slice into 1/4cm rounds
Place in a microwave safe container with a little water.
Microwave for 5 minutes at 800w or for 6 minutes at 600w, then drain and put to one side
Trim, clean and slice the leek. I cut mine in half lengthwise, then into slices of about 1cm
Warm the oil in your skillet
Add the leeks and cook over a low heat for 5 minutes
Add the drained potato slices and continue to cook for a few minutes, then season well and pour in the wine
Raise the temperature of the hob and bring the mixture to simmering point
Reduce the wine down by 50% or so
Season the sea bass fillets and place them skin side up on the potato and leek mixture. If you like, spray the skin with a little oil
Put the dish in the air fryer at 170c on roast setting
Cook for 8 minutes or till the fish is cooked through and the skin is just crisp
Finish with butter and serve with lemon on the side and a steamed green vegetable