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Sea bass with fennel, orange and olive

Sea bass fillets over braised fennel with orange and a few black olives.

By The foodose editorial team. Nutrition calculated from USDA FoodData Central. Checked on paper on 20 September 2026; not yet cooked in a test kitchen or photographed, so the times and yield are estimates. How we develop our recipes
What still needs a real kitchen
  • Confirm sliced fennel is tender after 20 minutes total
  • Confirm 150 g fillets cook through in 7 to 9 minutes covered
  • Photograph the finished pan
Time
About 40 min
estimated
Serves
2
see below
Energy
330 kcal
per serving
Protein
31 g
per serving
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Not yet photographed. The panel names the dish’s main ingredients rather than showing a picture we have not taken.

Ingredients for 2 servings

2 servings

Check off ingredients as you go.

Contains fish. Check the labels on packaged ingredients:

  • vegetable stock. Vegetable stock often contains celery, and some contain milk or gluten; check the label, especially if you need it vegan.
  • black olives. Olives are packed in brine and are salty; rinsing removes some of it.

Cooking steps

  1. Slice the fennel thinly, keeping any fronds. Soften it in the oil in a wide lidded pan over medium-low heat for 5 minutes.

  2. Add the stock, cover and braise for 15 minutes, until the fennel is completely tender.

  3. Segment the orange over the pan so the juice falls in, and add the segments with the olives.

  4. Lay the sea bass fillets skin side up on the fennel, cover, and cook for 7 to 9 minutes.

    Cooked when: 63°C / 145°F, or until the flesh is opaque and flakes easily. A food thermometer is the reliable way to tell.

  5. Finish with the parsley and any fennel fronds, and spoon the pan liquid over as you serve.

The useful detail

Cook the fish on top of the fennel rather than down in the liquid. It steams in the rising moisture and stays in one piece; submerged, it poaches and falls apart when you lift it.

Make it work for you

One serving is 150 g of sea bass with half the braised fennel. You can switch to a smaller portion in the ingredients above; it is three quarters of this, and it contains correspondingly less energy and protein. It is an option, not a goal.

  • Hake instead of sea bass

    Flakier and slightly softer. The same timing.

    Per serving: about 10 kcal less, about the same protein, about 1 g less fat.

  • Leave out the olives

    Cleaner and sweeter. Add a spoonful of capers if you want the salt.

  • Lemon instead of orange

    Sharper, without the sweetness that balances the olives.

    Per serving: about 40 kcal less, about 1 g less protein, about the same fat.

Estimated nutrition

Per standard serving, calculated from the ingredients above. Nutrition changes with substitutions, brands and how much oil stays in the pan.

A dinner where a whole braised bulb of fennel stands in for a starch, so the plate is full without the calories a potato would bring.

Nutrition per serving
Energy330 kcal
Protein31 g
Fat13 g
of which saturates2 g
Carbohydrate24 g
of which sugars15 g
Fibre7 g
Sodium660 mg
Show calculation notes

Each ingredient’s weight is multiplied by its USDA FoodData Central values per 100 g. The whole recipe is added up and divided by 2. Raw weights are used for meat, fish and vegetables; beans and lentils are drained weights. All of the oil is counted as eaten. Added salt is not included; sodium from stock, bread, cheese and tinned food is.

Calculation, whole recipe
IngredientWeight usedSourceEnergyProtein
fennel300 gFDC 169385Fennel, bulb, raw93 kcal3.7 g
olive oil14 gFDC 171413Oil, olive, salad or cooking121 kcal0.0 g
vegetable stock195 gFDC 171583Soup, vegetable broth, ready to serve10 kcal0.5 g
oranges180 gFDC 169097Oranges, raw, all commercial varieties85 kcal1.7 g
black olives50 gFDC 169094Olives, ripe, canned (small-extra large)58 kcal0.4 g
sea bass300 gFDC 175142Fish, sea bass, mixed species, raw291 kcal55.3 g
parsley5 gFDC 170416Parsley, fresh2 kcal0.1 g
Whole recipeDivided by 2659 kcal61.7 g

Per serving the energy is rounded to the nearest 5 kcal, grams to the nearest whole gram and sodium to the nearest 10 mg. Calculation method 1.0, September 2026. How the calculation works.

Storage and reheating

In the fridge
Cool, cover and refrigerate within 2 hours of cooking. Eat within 3 to 4 days. The fennel is good cold the next day, even if the fish is best eaten now.
In the freezer
The FDA chart gives cooked fish 4 to 6 months in the freezer for best quality.
Reheating
Reheat until it reaches 74°C / 165°F, steaming hot throughout.

Checked against US Food and Drug Administration, Refrigerator and Freezer Storage Chart, USDA Food Safety and Inspection Service, Leftovers and Food Safety, FoodSafety.gov, Safe Minimum Internal Temperatures and FoodSafety.gov, Cold Food Storage Chart. UK guidance from the Food Standards Agency is shorter, at two days for most leftovers.

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