Butter the inside of the lid or cover the terrine with buttered and perforated foil (to allow steam to vent). https://staalsmokehouse.co.uk/recipes/entertaining/mary-berry-3-fish-terrine Mix the milk with 10 fl oz water, pour it into a large shallow pan and bring to the boil. Lightly grill the smoked haddock and mix with the potatoes, leeks, chives and cream mixture. Chowder is a hearty bowl of food - here the Wrap 10 cloves of garlic in foil. Place smoked and fresh haddock, 4 garlic cloves, thyme, and vegetables in a large pan. Remove haddock from the liquid and flake into a mixing bowl. Bake in moderate oven for 20 minutes. by Nigel Slater. Blanch the spinach leaves and wrap around the terrine. Peel and roughly chop. Line a terrine mould with clingfilm, place the mixture inside and press overnight in the fridge. Butter a terrine or bread pan, spoon in the haddock and shrimp mixture. Add the Cover with water and simmer for five minutes.