Preheat oven to 200°C.
Place the fish, herbs, 1 tablespoon of Fish Spice and enough olive oil to coat in a bowl, combine and set aside in the fridge.
Wash potatoes and place on tray, cook in oven until soft and fluffy on inside (around 45 minutes).
Sauté onion, garlic, celery and fennel in a saucepan on low to medium heat for about 5 minutes until soft. Add remaining Fish Spice and allow to slightly caramelise.
Deglaze with white wine, add stock and milk. Simmer for 5 minutes or until sauce thickens slightly.
Take potatoes out and peel quickly, add 1-2 tablespoons of butter and the Garlic Lovers’ Spice and mash roughly.
Add fish and a few cubes of butter to the sauce, simmer for 5 minutes.
Put the potato mixture on top of the fish mixture (if your pan allows it, otherwise transfer to a small baking dish), place in oven, cook for a further 10 minutes.
