Place a large piece of aluminium foil (shiny side up) on a baking tray / sheet. Ensure big enough so that it can fold over thus creating a bag with the fish inside.
Place washed and dried hake fillets onto foil.
Drizzle olive oil, lemon juice and salad dressing over the fish.
Season with garlic salt, pepper and mixed dried herbs.
Place garlic slices over fish and drop small bits of butter over fish. Alternatively, butter may be melted and drizzled over the fish.
Fold foil over the fish and fold ends around the fish together to create a bag.
Place into preheated oven (120 Degrees Celsius) and bake for roughly 15 to 20 minutes or until cooked.