Step-1Heat oven to 200 deg cel. Tip the potatoes,onion, garlic,oregano and olive oil into roasting tin.
Step-2Seam them together with your hands to coat everything in the oil
Step-3Roast for 15mins
Step-4Add the lemon and tomatoes and roast for 10 mins
Step-5Then top with the fish fillet and cook for 10 mins more.serve with parsley scattered over