Cooked Fish with Olive Oil and Lemon
Ingredients:
- Trout fillets (600 g)
- Extra virgin olive oil (3 tbsp)
- Lemon (1)
- Parsley (1 tbsp chopped)
- Salt and black pepper
Method:
Fresh fish with an olive-oil dressing
Serves 4. Allow about 25 minutes. Tender flakes of trout, lemon and parsley make a simple lunch, warm or chilled. Ask your fishmonger about the species, origin and farming or fishing method when choosing fish; sustainability depends on the source.
Read this before preparing ahead
This is a cooked meal, not homemade canned fish. Do not pack it tightly into a jar or store it submerged in oil. Oil excludes oxygen; some botulism bacteria associated with fish can grow at refrigerator temperatures. Ordinary cooking and a sterilised empty jar do not provide a validated preservation process. There is no two-day maturation step and no one-week storage allowance in this recipe.
Prepare and cook
Use 600 g of boneless trout fillets, divided into four similar portions. Remove remaining pin bones. Wash hands and utensils after handling raw fish and use a clean plate for the cooked fish. Keep the three tablespoons of olive oil for serving.
For gentle poaching, bring enough lightly salted water to cover the fish to a simmer in a wide pan. Lower in the fillets and maintain a gentle simmer. Start checking after 8 minutes; thickness affects the time.
Alternatively, put the fillets on baking parchment with two tablespoons of water in a baking dish and cook at 180°C, checking after 12 minutes. For the hob, use a non-stick pan with a splash of water, cover and cook over medium-low heat, turning gently if needed.
For every method, use a clean food thermometer to check that the thickest part reaches 63°C (145°F). Continue cooking until it does. This temperature is for a freshly cooked meal, not sterilisation for canning.
Dress only the portions you will eat now
Lift the fish onto plates and gently separate into large flakes. Divide the olive oil between the four portions, add a squeeze of lemon, the chopped parsley and pepper. Taste before adding salt. Eat straight away. Lemon and herbs provide flavour; they do not make this a tested acidified preserve.
If serving chilled
Set aside any portions for later before adding the dressing. Cool the plain cooked fish promptly in small, clean, shallow containers; do not compress it or vacuum-pack it. Refrigerate within 2 hours of cooking, or within 1 hour if the room is above 32°C. Keep the fridge at 4°C or colder, checked with a thermometer, and cover the chilled food. Label the cooking time and eat within 48 hours of cooking. Add oil, lemon and parsley only when serving, then eat immediately. The 48-hour limit applies to plain cooked leftovers, not fish stored under oil. Discard food if these limits have not been maintained.
If you want an actual preserve
Use the complete tested NCHFP tuna procedure with a suitable pressure canner, its specified jars and altitude adjustments. Do not transfer it to trout or improvise with a saucepan, oven or ordinary pressure cooker. See NCHFP: pressure-canning tuna.
Food-safety sources
Checked 13 September 2026: FDA: fish and reduced oxygen, ISS: botulism and home preserves, FDA: cooking seafood, FDA: cooling and refrigeration, FSA: cooked leftovers.