You will want get the potatoes on first as these take the longest.
Potatoes.
In a medium bowl mix potatoes with oil and season with salt and pepper. Place in roasting pan with garlic cloves and cook in 200c oven for 30-40 minutes.
Serve potatoes and garlic on the side and sprinkle with mint.
For the Fish.
In a saucepan bring some water to a boil and add spinach, for fresh cook until just wilted, for frozen cook until thawed, drain, let it cool and then squeeze excess liquid out.
In a pan combine oil and butter and heat, add onions and cook until soft, add mushrooms and garlic, cook until mushrooms are slightly browned and soft set to one side.
For the Sauce.
Heat milk in a pan, add cayenne, nutmeg and paprika. When milk is almost boiling mix a little water with cornflour and pour into milk, stirring until mixture thickens.
Add the cheeses, reserving the few tablespoons of Parmesan for the top, stir until melted.
Poaching fish.
In a large pan mix wine with herbs, add fish and poach for about 8 minutes until fish flakes but is not falling apart.
Assembly.
Mix mushroom and onion mixture into spinach, spoon into the bottom of a casserole dish covering the bottom.
Lay fish fillets on top of the spinach, Pour the sauce over fillets, sprinkle with remaining Parmesan cheese.
Grill until browned on top and bubbling.
While I am grilling fish I put my potatoes over low heat on stove top to keep warm.
