Name: Italian Tuna Potato Salad
Prep time: 20 min
Cook time: 20 min
Total time: 40 min
Ingredients: 1 1/2 pounds waxy potatoes, such as Yukon Gold, cut into 1-inch chunks; 2 teaspoons kosher salt, plus more to taste; 2 cans (5 oz each) high-quality tuna in olive oil, drained; 1/2 cup red onion, thinly sliced; 1 cup cherry tomatoes, halved; 1/2 cup pitted black olives, halved; 2 tablespoons capers, rinsed; 1/4 cup fresh parsley, chopped; 3 tablespoons extra-virgin olive oil; 2 tablespoons fresh lemon juice; 1 teaspoon Dijon mustard; 1/2 teaspoon dried oregano; 1/4 teaspoon freshly ground black pepper, plus more to taste

Italian Tuna Potato Salad tastes bright, briny, herby, and comforting all at once, like a mash-up of niçoise salad and your favorite deli potato salad. It works perfectly for busy weeknights, meal prep lunches, and potlucks, and you can finish it in about 40 minutes start to finish. I first made a version of this on a hot New York summer night when I refused to turn on the oven, and it never left my rotation.

Why You Should Try This Italian Tuna Potato Salad

This salad hits that magic combo of hearty and fresh. Tender potatoes soak up a lemony olive oil dressing, while good-quality tuna, crisp veggies, and salty pops of olives and capers keep every bite interesting.

It packs protein, healthy fats, and fiber, so it works as a full meal, not just a side dish. You can serve it slightly warm or chilled, and it travels well for picnics and lunches.

“I made this Italian Tuna Potato Salad for a Sunday lunch, and my family scraped the bowl clean. The potatoes tasted creamy, the tuna stayed juicy, and the lemony dressing tied everything together. It felt light but still filled everyone up, and the leftovers tasted even better the next day.”

Ingredients You’ll Need

Core ingredients

Yukon gold potatoes (about 2 pounds), scrubbed and cut into bite-size chunks
- They hold shape better than russets and taste naturally buttery.
Canned tuna in olive oil (2 standard 5-ounce cans), drained but not bone-dry
- Italian brands like Rio Mare or Genova taste rich and meaty, but any solid or chunk light tuna in olive oil works.
Red onion (about 1 small), thinly sliced
Celery (2 to 3 ribs), finely chopped
Cherry or grape tomatoes (1 to 1½ cups), halved
Kalamata or oil-cured black olives (½ cup), pitted and roughly chopped
Capers (2 to 3 tablespoons), drained
Fresh parsley (½ cup), chopped
Fresh basil (¼ cup), torn or sliced into ribbons

Dressing ingredients

Extra virgin olive oil (about ⅓ cup)
- Use your good bottle here, since the dressing carries the flavor.
Fresh lemon juice (from 1 to 2 lemons, about ¼ cup)
Red wine vinegar (1 tablespoon)
Dijon mustard (1 teaspoon)
Garlic (1 to 2 cloves), very finely minced or grated
Dried oregano (½ teaspoon)
Crushed red pepper flakes (optional, ¼ teaspoon)
Kosher salt and freshly ground black pepper, to taste

Pantry shortcuts and substitutions

Swap Yukon gold potatoes with small red potatoes if you have those on hand.
Use tuna in water if that sits in your pantry; just add an extra tablespoon of olive oil to the dressing.
Replace red onion with shallots or sweet onion if you prefer a milder bite.
Use green olives instead of black for a brighter, sharper flavor.
Stir in cannellini beans or chickpeas for extra protein and fiber if you want a more filling salad.
Add steamed green beans or blanched asparagus if you crave more veggies in the bowl.

Optional add-ins

Hard-boiled eggs, quartered
Cucumber, chopped
Roasted red peppers, sliced
Artichoke hearts, quartered
A spoonful of mayo or Greek yogurt if you like a creamier potato salad texture

Equipment list

Large 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
Wooden spoon or spatula
Tongs (helpful but optional)

Tips & Tricks

Salt the potato cooking water generously so the potatoes taste seasoned from the inside out.
Cut potatoes into similar sizes so they cook evenly and finish at the same time.
Test potatoes early; pull them when they feel tender but still hold shape, not mushy.
Toss warm potatoes with part of the dressing so they soak up flavor while still hot.
Let the tuna stay in larger chunks instead of shredding it into tiny bits, so you get satisfying bites.
Rinse sliced red onion under cold water for 30 seconds if you want a milder onion flavor.
Taste the salad after it sits for 10 minutes, then adjust salt, pepper, and lemon juice.
Chill the salad at least 20 to 30 minutes if you prefer it cold, but bring it out a few minutes before serving so the flavors wake up.
Pack leftovers in shallow containers so the dressing coats everything evenly.
Stir gently from the bottom before serving leftovers, since the dressing tends to sink.

How to Make Italian Tuna Potato Salad

Step 1: Cook the potatoes

Fill a large pot with cold water, add the potato chunks, and season the water with a generous pinch of salt. Bring the pot to a gentle boil over medium-high heat, then lower the heat to maintain a steady simmer. Cook the potatoes until a fork slides in easily but the pieces still hold shape, about 10 to 12 minutes.

Drain the potatoes in a colander and let them steam off for a couple of minutes. That quick rest helps excess moisture escape so the dressing clings better. Transfer the warm potatoes to a large mixing bowl.

Step 2: Mix the dressing

Add olive oil, lemon juice, red wine vinegar, Dijon mustard, garlic, dried oregano, crushed red pepper flakes, salt, and black pepper to a small jar. Screw on the lid and shake until the dressing looks emulsified and creamy. Taste and adjust with more salt, pepper, or lemon juice as needed.

If you do not have a jar, whisk everything in a small bowl until it looks smooth. Keep the dressing nearby, since you will use part of it on the warm potatoes and the rest later. Give it a quick whisk or shake again right before you pour it.

Step 3: Dress the warm potatoes

Pour about half of the dressing over the warm potatoes in the bowl. Toss gently with a spatula or wooden spoon so you coat all the pieces without breaking them. The warm potatoes soak up the dressing and pick up a ton of flavor at this stage.

Let the potatoes sit while you prep the rest of the ingredients. They cool slightly and firm up again, which helps them hold shape when you mix everything together. Taste a potato piece and adjust seasoning if it needs more salt.

Step 4: Prep and add the mix-ins

Slice the red onion thinly, chop the celery, halve the cherry tomatoes, and chop the olives. Roughly chop the parsley and tear or slice the basil. Add all of these to the bowl with the potatoes.

Open the tuna cans, drain most of the oil, and flake the tuna into large chunks with a fork. Add the tuna to the bowl, along with capers and any optional add-ins you like, such as roasted red peppers or artichoke hearts. Keep the tuna pieces fairly large so they stand out in the salad.

Step 5: Finish and adjust

Pour the remaining dressing over the salad. Toss gently from the bottom up, so you coat the potatoes and tuna without smashing them. Taste and adjust with more salt, pepper, or lemon juice until the flavors pop.

Let the Italian Tuna Potato Salad rest for at least 10 to 15 minutes at room temperature so the flavors mingle. Serve slightly warm or chill it for 20 to 30 minutes if you prefer a colder salad. Right before serving, sprinkle a little extra chopped parsley or basil over the top for color.

What to Serve with Italian Tuna Potato Salad

This Italian Tuna Potato Salad works as a full meal, but it also pairs nicely with simple sides. Serve it with a crisp green salad, sliced cucumbers, or steamed green beans for extra veggies. Add some crusty bread or focaccia to scoop up the dressing and stray bits of tuna.

It also sits nicely next to grilled chicken, simple baked fish, or roasted vegetables. For a light lunch spread, set it out with marinated olives, fresh fruit, and a platter of sliced tomatoes with a drizzle of olive oil and salt.

Storage Options

Store Italian Tuna Potato Salad in an airtight container in the fridge for up to 3 days.
Stir gently before serving leftovers, and add a small splash of olive oil or lemon juice if it tastes a bit tight.
Avoid freezing this salad, since potatoes and tuna change texture and turn grainy after thawing.
Eat it cold from the fridge or let it sit at room temperature for 10 to 15 minutes; no reheating needed, which makes it perfect for hot days and easy lunches.