Name: Italian Tuna Potato Salad
Prep time: 20 min
Cook time: 15 min
Total time: 35 min
Ingredients: 1.5 pounds small yellow or Yukon Gold potatoes, scrubbed and cut into bite-size chunks; 2 cans high-quality tuna packed in olive oil, drained but not squeezed dry; 1 small red onion or 2 shallots, thinly sliced; 1 cup cherry or grape tomatoes, halved; 1 small cucumber, chopped (Persian or English); 1 rib celery, finely diced; 1/4 cup pitted Kalamata or Castelvetrano olives, sliced; 2 tablespoons capers, rinsed; 1/4 cup flat-leaf parsley, chopped; 2 tablespoons fresh basil, torn or chopped; 1 tablespoon fresh oregano, finely chopped; 1/3 cup extra virgin olive oil; 3 tablespoons fresh lemon juice; 1 tablespoon red wine vinegar; 1 teaspoon Dijon mustard; 1 clove garlic, very finely minced or grated; 1/2 teaspoon dried oregano; 1/2 teaspoon kosher salt, plus more to taste; 1/4 teaspoon black pepper; 1 pinch red pepper flakes; 2 large hard-boiled eggs, quartered; 1/4 cup marinated artichoke hearts, chopped; 1 handful arugula or baby spinach, added just before serving

Italian Tuna Potato Salad tastes bright, briny, herby, and comforting, like a Nicoise salad and a classic American potato salad had a very delicious Italian cousin. It works perfectly for busy weeknights, meal prep lunches, or a make-ahead dish for potlucks, and you can get it on the table in about 35 minutes. I first made a version of this in a tiny apartment kitchen with one sad pot, and it still tasted like vacation in a bowl.

Why Make This Italian Tuna Potato Salad at Home

You control the quality of the tuna, the amount of olive oil, and the level of acidity, so the salad tastes fresher than any deli version. You also skip heavy mayo and use a zippy olive oil dressing instead, which keeps it lighter but still super satisfying.

You can prep the components ahead and toss them together right before serving, so it works well for entertaining or weekly lunches. Leftovers taste even better the next day, because the potatoes soak up all that garlicky, lemony dressing.

“This Italian Tuna Potato Salad tastes like something from a little coastal trattoria, but it comes together in one pot and one bowl at home. ★★★★★”

Ingredients You Need

Potatoes
- 1.5 pounds small yellow or Yukon Gold potatoes, scrubbed, cut into bite-size chunks
- Waxy potatoes hold their shape best and stay creamy inside.
Tuna
- 2 cans high-quality tuna packed in olive oil, drained but not squeezed dry
- Use Italian tuna in olive oil if you can; it tastes richer and more tender.
Vegetables & add-ins
- 1 small red onion or 2 shallots, thinly sliced
- 1 cup cherry or grape tomatoes, halved
- 1 small cucumber, chopped (Persian or English works best)
- 1 rib celery, finely diced
- 1/4 cup pitted Kalamata or Castelvetrano olives, sliced
- 2 tablespoons capers, rinsed
Fresh herbs
- 1/4 cup flat-leaf parsley, chopped
- 2 tablespoons fresh basil, torn or chopped
- Optional: 1 tablespoon fresh oregano, finely chopped
Dressing
- 1/3 cup extra virgin olive oil
- 3 tablespoons fresh lemon juice
- 1 tablespoon red wine vinegar
- 1 teaspoon Dijon mustard
- 1 small garlic clove, very finely minced or grated
- 1/2 teaspoon dried oregano
- 1/2 teaspoon kosher salt, plus more to taste
- 1/4 teaspoon black pepper
- Optional: pinch of red pepper flakes
Optional extras
- 2 hard-boiled eggs, quartered
- 1/4 cup marinated artichoke hearts, chopped
- A handful of arugula or baby spinach to toss in right before serving
Pantry shortcuts & substitutions
- Use canned potatoes in a pinch, drain and rinse them, then warm them briefly in salted water to refresh the texture.
- Swap red onion with green onions if you want a milder bite.
- Use canned green olives if you do not have fancy ones; just rinse them to cut the brine.
- If you avoid Dijon, use a bit of whole grain mustard or skip it and add a touch more salt.
Equipment
- Medium pot for boiling potatoes
- Colander
- Large mixing bowl
- Small jar with lid or small bowl and whisk for the dressing
- Cutting board and sharp knife
- Spoon or spatula for tossing

Tips & Mistakes

Salt the potato cooking water generously so the potatoes taste seasoned all the way through.
Cut potatoes into similar sizes so they cook evenly and you avoid mushy bits.
Add the dressing to the potatoes while they still feel warm so they soak up more flavor.
Do not overcook the potatoes; stop when they feel just fork tender and hold their shape.
Use tuna in olive oil, not water, for better flavor and texture in the salad.
Drain tuna gently and avoid shredding it into tiny bits so you keep nice chunks in the bowl.
Slice onions thin and soak them in cold water for 10 minutes if you want a milder taste.
Taste and adjust salt and acid at the end; potatoes often need more seasoning than you expect.
Chill the salad at least 20 to 30 minutes before serving so the flavors meld.
Do not freeze the salad; potatoes and tuna change texture and turn grainy.

How to Make Italian Tuna Potato Salad

Step 1: Cook the potatoes

Bring a medium pot of water to a boil and add a generous spoonful of salt. Add the potato chunks and cook them until they feel just tender when you pierce them with a fork, about 10 to 12 minutes. Drain them in a colander and let them steam off for a couple of minutes so excess moisture escapes.

Step 2: Mix the dressing

While the potatoes cook, add olive oil, lemon juice, red wine vinegar, Dijon mustard, garlic, dried oregano, salt, pepper, and red pepper flakes to a small jar. Shake the jar until the dressing looks emulsified and smooth. Taste it and adjust with a bit more salt or lemon juice if you want more brightness.

Step 3: Dress the warm potatoes

Transfer the warm potatoes to a large mixing bowl. Pour about two thirds of the dressing over them while they still feel warm and toss gently so you coat every piece. Let the potatoes sit and absorb the dressing while you prep the rest of the ingredients.

Step 4: Prep the vegetables and herbs

Slice the red onion very thin and, if you want a milder flavor, soak the slices in cold water for 10 minutes, then drain well. Halve the cherry tomatoes, chop the cucumber and celery, slice the olives, and rinse the capers. Chop the parsley and basil and keep them ready.

Step 5: Add tuna and veggies

Flake the tuna into large chunks and add it to the bowl with the potatoes. Add the onion, tomatoes, cucumber, celery, olives, capers, and any extras like artichoke hearts. Toss gently so you keep some bigger tuna pieces and avoid smashing the potatoes.

Step 6: Finish with herbs and adjust

Add the chopped parsley and basil to the bowl. Pour the remaining dressing over the salad and toss again until everything looks glossy and well coated. Taste and adjust with more salt, pepper, or lemon juice until the Italian Tuna Potato Salad tastes bright, savory, and balanced.

Step 7: Chill and serve

Cover the bowl and chill the salad in the fridge for at least 20 to 30 minutes. This rest time lets the potatoes soak up more flavor and helps the onion mellow. Right before serving, toss again and add a handful of arugula or spinach if you like a bit of fresh green crunch.

Variations I've Tried

I sometimes add green beans that I blanch until crisp tender, then toss in with the potatoes for a Nicoise-style twist. I also like a version with extra capers, no tomatoes, and a little more red onion for a sharper, more briny flavor. On hot days, I bulk it up with canned chickpeas and extra cucumber to turn it into a full meal salad.

You can keep it super simple with just potatoes, tuna, onion, parsley, and dressing when the pantry looks bare. I also tried a version with roasted red peppers and artichokes, which gave the salad a slightly smoky, antipasto vibe that tasted great with crusty bread.

How to Serve Italian Tuna Potato Salad

Serve Italian Tuna Potato Salad slightly chilled or at cool room temperature so the flavors stand out and the olive oil stays loose. Spoon it into shallow bowls and top it with extra herbs and a squeeze of lemon. Pair it with crusty bread, focaccia, or simple toasted sourdough, plus a green salad or sliced cucumbers on the side.

It also packs well in lunch containers, so you can bring it to work, picnics, or road trips. Kids often like it with plain crackers or carrot sticks, and you can set extra lemon wedges and olives on the table so everyone customizes their bowl.

How to store

Fridge: Store Italian Tuna Potato Salad in an airtight container in the refrigerator for up to 3 days.
Freezer: Skip freezing, because potatoes and tuna both change texture and turn mealy after thawing.
Reheating / serving: Eat it chilled or at cool room temperature; if it feels too firm from the fridge, let it sit out 15 minutes, then toss with a drizzle of fresh olive oil and a squeeze of lemon to wake up the flavors.