Tuna Niçoise salad is a meal of contrasts: tender potatoes, crisp green beans, juicy tomatoes, firm eggs and generous flakes of tuna. A mustard dressing brings everything together, while olives add little bursts of savoury flavour. Arranging the ingredients on a platter, rather than tossing them vigorously, keeps those textures distinct and makes the finished salad easy to share.
This home version uses tinned tuna and includes potatoes and green beans. It is a practical interpretation rather than a claim to a definitive regional recipe. The focus is on cooking each ingredient well and bringing everything together just before serving, so the lettuce stays crisp and the potatoes carry plenty of flavour.
Ingredients for two main servings
Allow about 15 minutes for preparation and 20 minutes for cooking, with several tasks overlapping. You can serve the salad with gently warm potatoes or let the cooked ingredients cool completely first.
For the salad
- 300g small waxy potatoes, scrubbed
- 150g green beans, trimmed
- 2 medium eggs
- 1 tin tuna in spring water or olive oil, about 145g before draining
- 150g cherry tomatoes, halved
- 1 little gem lettuce, leaves separated, washed and dried
- 40g pitted black olives, drained
- A quarter of a small red onion, thinly sliced
- 1 tablespoon chopped flat-leaf parsley
- 4 anchovy fillets, drained, optional
For the dressing
- 2 tablespoons extra virgin olive oil
- 1 tablespoon red wine vinegar
- 1 teaspoon Dijon mustard
- 1 tablespoon water, plus a little extra if needed
- Freshly ground black pepper
- A small pinch of salt, only if needed
Small waxy potatoes hold their shape well after boiling and slicing. Larger waxy potatoes also work: cut them into evenly sized pieces before cooking. Choose tuna in water or oil according to your preference and drain it thoroughly. The optional anchovies make the salad more savoury, but the tuna and olives provide plenty of flavour without them.
How to make tuna Niçoise salad
- Cook the potatoes. Put them in a saucepan, cover with cold water and bring to the boil. Reduce to a steady simmer and cook for 12 to 18 minutes, depending on size. They are ready when a small knife slides easily into the centre. Drain and leave to steam dry briefly.
- Boil the eggs. Meanwhile, bring a separate small saucepan of water to a gentle boil. Carefully lower in the eggs and simmer for 10 minutes for firm yolks. Transfer to cold water, then peel once cool enough to handle. Set aside for quartering before assembly.
- Cook the beans. Bring a saucepan of water to the boil. Add the trimmed beans and cook for 3 to 5 minutes until tender with a little bite. Drain and rinse under cold running water to stop the cooking. Drain again and pat dry with a clean tea towel or kitchen paper.
- Whisk the dressing. Combine the olive oil, vinegar, mustard and water in a small bowl. Whisk until blended, then add black pepper. Taste before adding salt, remembering that the olives, tuna and anchovies also contribute seasoning. If it tastes too sharp, whisk in another teaspoon of water.
- Dress the potatoes. When comfortable to handle, halve or thickly slice them. Fold through about one third of the dressing while they are still warm. Use a spoon and a gentle hand to keep the pieces intact. Let them cool slightly while you prepare the remaining ingredients.
- Prepare the fresh ingredients. Halve the tomatoes and thinly slice the onion. For a milder onion flavour, soak the slices in cold water for 5 minutes, then drain and dry. Drain the tuna and separate it into chunky flakes. Quarter the peeled eggs.
- Arrange the salad. Spread the dry lettuce across a wide platter or two plates. Add the potatoes, beans, tomatoes and onion in loose groups. Distribute the tuna, egg quarters and olives evenly, then lay over the anchovies if using.
- Finish and serve. Spoon the remaining dressing over the vegetables and tuna. Scatter with parsley, add black pepper to taste and serve promptly. Keep the arrangement loose so everyone can easily take a mixture of ingredients.
Getting the textures right
Dry the vegetables properly
Water clinging to lettuce or beans dilutes the dressing and can collect beneath the salad. Give the leaves a thorough dry and let the beans drain before patting them dry. Allowing potatoes to steam dry helps too. These small pauses give you a more evenly dressed plate without needing extra oil or mustard.
Season the potatoes while warm
Adding a little dressing before assembly gives the potatoes flavour throughout the dish. They should be warm enough to dress comfortably, rather than piping hot. Keep most of the dressing for the remaining ingredients, and avoid placing heavily steaming potatoes directly on the lettuce, where they can soften the leaves.
Keep the tuna chunky
Large flakes contrast nicely with the vegetables and make it easier to share the tuna evenly. Add them towards the end and avoid stirring once the eggs are in place. The aim is a composed salad with recognisable pieces, rather than a finely mixed filling.
Serving and simple variations
The potatoes make this substantial enough for a main meal. Add wholemeal bread if you would like something extra to mop up the dressing. For a shared lunch, bring the platter to the table with serving spoons so each person can choose their mixture.
- Try capers: replace half the olives with 1 teaspoon of drained capers for a sharper finishing touch.
- Change the herbs: use torn basil instead of parsley, adding it just before serving.
- Use larger tomatoes: cut ripe salad tomatoes into wedges and leave excess juice on the chopping board.
- Make the onion gentler: use a small spring onion instead of the red onion.
Preparing ahead and storing leftovers
You can prepare the potatoes, eggs, beans and dressing the day before. Cool cooked ingredients promptly and refrigerate them in separate covered containers within two hours. Keep your fridge at 5°C or below. Store washed, thoroughly dried lettuce separately, and assemble the salad shortly before you plan to eat.
Transfer opened tuna to a covered container and refrigerate it, following any shorter storage instructions on the packaging. Use the prepared components within two days of cooking or opening. Refrigerate assembled leftovers promptly and eat them the following day, within that same overall window. Dressing only the portions you need helps the remaining leaves retain their crunch.
