Name: Italian Tuna Potato Salad
Prep time: 20 min
Cook time: 15 min
Total time: 35 min
Ingredients: 1.5 pounds small waxy potatoes, such as Yukon gold, baby red, or fingerling, cut into 1-inch pieces; 2 cans tuna packed in olive oil, 5 to 7 ounces each, drained well; 1 small red onion or 2 large shallots, thinly sliced; 2 ribs celery, thinly sliced; 1 cup cherry or grape tomatoes, halved; 1/2 cup pitted olives, sliced; 2-3 tablespoons capers, drained; 1/4 cup fresh parsley, chopped; 2 tablespoons fresh basil or oregano, chopped (optional); 1/3 cup extra virgin olive oil; 4 tablespoons fresh lemon juice, divided; 1 tablespoon red wine vinegar; 1-2 cloves garlic, very finely minced or grated; 1 teaspoon Dijon mustard; 1-1.5 teaspoons kosher salt, plus more to taste; 1/2 teaspoon freshly ground black pepper; 1/4 teaspoon red pepper flakes (optional)

Italian Tuna Potato Salad tastes bright, briny, and herby, with tender potatoes, flaky tuna, and crunchy veggies in a zippy olive oil dressing. It works for busy weeknights, meal prep, or potlucks and comes together in about 35 minutes. I tested this on my picky cousin who “doesn’t like tuna” and watched him go back for thirds.

Why Make This Italian Tuna Potato Salad at Home

You control the quality of the tuna, the amount of salt, and the level of tang in the dressing, so the salad tastes fresher than any deli version. You also skip heavy mayo and use extra virgin olive oil, which keeps the salad lighter but still satisfying.

This salad tastes great warm, at room temperature, or chilled, so it fits into almost any schedule. It also travels well, so you can pack it for work lunches, picnics, or road trips without worrying about it turning sad and soggy.

“Bright, hearty, and full of flavor, this Italian Tuna Potato Salad tastes like something from a little coastal trattoria, not my basic American kitchen. ★★★★★”

Ingredients You Need

Main ingredients

Potatoes:
- 1.5 pounds small waxy potatoes (Yukon gold, baby red, or fingerling)
- Waxy potatoes hold their shape and keep a creamy, not mushy, texture.
Tuna:
- 2 cans high quality tuna, 5 to 7 ounces each
- Use tuna packed in olive oil for richer flavor.
- Water packed tuna works too; just add an extra tablespoon of olive oil to the dressing.
Red onion or shallot:
- 1 small red onion or 2 large shallots, thinly sliced
- Soak slices in cold water for 10 minutes if you want a milder bite.
Celery:
- 2 ribs celery, thinly sliced for crunch and freshness.
Cherry or grape tomatoes:
- 1 cup, halved
- Roma tomatoes, seeded and chopped, also work.
Olives:
- 1/2 cup pitted olives, sliced
- Kalamata or Castelvetrano taste great; use what you like.
Capers:
- 2 to 3 tablespoons, drained
- They add a salty, briny punch that makes the salad taste very Italian.
Fresh herbs:
- 1/4 cup chopped fresh parsley
- Optional: 2 tablespoons chopped fresh basil or oregano if you have them.

Dressing ingredients

Extra virgin olive oil:
- 1/3 cup
- Use your good bottle here, since the flavor really shows.
Lemon juice:
- 3 to 4 tablespoons fresh lemon juice
- Start with 3, then taste and add more if you want extra tang.
Red wine vinegar:
- 1 tablespoon
- Balances the lemon and adds that classic Italian salad flavor.
Garlic:
- 1 to 2 cloves, very finely minced or grated
- Use 1 clove if you prefer a softer garlic flavor.
Dijon mustard:
- 1 teaspoon
- Helps the dressing cling to the potatoes and tuna.
Salt and black pepper:
- 1 to 1.5 teaspoons kosher salt, plus more to taste
- 1/2 teaspoon freshly ground black pepper
Optional add ins:
- 1/4 teaspoon red pepper flakes for a little heat
- 1 teaspoon dried oregano if you do not have fresh herbs

Pantry shortcuts and substitutions

Use jarred roasted red peppers (sliced) instead of tomatoes when tomatoes taste bland.
Swap canned cannellini beans for half the potatoes if you want more protein and fiber.
Use frozen baby potatoes if you find them; boil from frozen and treat them the same.
If you do not like olives, add extra capers or some chopped marinated artichokes.

Equipment list

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
Wooden spoon or silicone spatula

Tips & Mistakes

Cut potatoes into equal size pieces so they cook at the same rate.
Salt the cooking water generously so the potatoes taste seasoned all the way through.
Test potatoes with a fork and stop cooking when they feel just tender; avoid boiling them until they fall apart.
Dress the potatoes while they still feel warm so they soak up the flavor better.
Drain tuna very well so the salad does not taste watery.
Flake tuna gently with a fork and keep some bigger chunks for better texture.
Taste the dressing before you add it and adjust salt, lemon, and vinegar to your liking.
Add tomatoes and delicate herbs near the end so they stay bright and fresh.
Chill the salad at least 20 minutes if you want the flavors to meld more deeply.
Do not over stir once everything comes together or the potatoes will break down too much.

How to Make Italian Tuna Potato Salad

Step 1: Prep and cook the potatoes

Scrub the potatoes and cut them into bite size chunks, about 1 inch pieces.
Add potatoes to a pot and cover with cold water by about 1 inch.
Add 1 to 2 tablespoons kosher salt to the water.
Bring the pot to a gentle boil over medium high heat.
Lower the heat slightly and cook until the potatoes feel just tender when you pierce them with a fork, about 10 to 15 minutes, depending on size.

Step 2: Drain and season the potatoes

Drain the potatoes in a colander and let them steam off for 2 to 3 minutes.
Transfer the warm potatoes to a large mixing bowl.
Sprinkle them with a pinch of salt and a tablespoon of lemon juice while they still feel warm.
Toss gently so the potatoes soak up that first hit of flavor.

Step 3: Mix the dressing

Add olive oil, lemon juice, red wine vinegar, Dijon mustard, minced garlic, salt, black pepper, and red pepper flakes (if using) to a small jar or bowl.
Shake the jar or whisk in the bowl until the dressing looks thick and well combined.
Taste and adjust with more salt, lemon, or vinegar until it tastes bright and balanced.

Step 4: Prep the mix ins

While the potatoes cook or cool, thinly slice the red onion or shallots and celery.
Halve the cherry tomatoes.
Slice the olives and roughly chop the capers if they look large.
Chop the fresh parsley and any other herbs you use.

Step 5: Add tuna and vegetables

Drain the tuna very well and add it to the bowl with the warm potatoes.
Use a fork to flake the tuna into chunks, then gently toss with the potatoes.
Add the onion, celery, tomatoes, olives, capers, and most of the herbs to the bowl.
Keep a small handful of herbs aside for garnish.

Step 6: Dress the salad

Pour about two thirds of the dressing over the potato and tuna mixture.
Toss gently from the bottom of the bowl so you coat everything without smashing the potatoes.
Taste and add more dressing, salt, or pepper as needed.
Sprinkle the remaining herbs on top.

Step 7: Rest and serve

Let the salad sit at room temperature for 15 to 20 minutes so the flavors mingle.
Serve slightly warm or chill it for at least 30 minutes if you prefer it cold.
Drizzle a little extra olive oil on top right before serving if the salad looks dry.

Variations I've Tried

Herby lemon version: Add extra parsley, basil, and a bit of fresh dill, plus more lemon zest and juice. This version tastes extra bright and works well for spring and summer.
Bean and potato combo: Replace half the potatoes with a can of rinsed cannellini beans. The beans soak up the dressing and give the salad a creamy, hearty feel.
Veggie heavy version: Add chopped cucumber, extra celery, and more tomatoes. This version tastes lighter and works nicely as a main dish on hot days.
Spicy Calabrian style: Stir in a teaspoon or two of Calabrian chili paste or crushed chili peppers. The gentle heat plays well with the briny tuna and capers.

How to Serve Italian Tuna Potato Salad

Serve Italian Tuna Potato Salad as a main dish with a simple green salad and some crusty bread. Pack it into lunch containers with carrot sticks, cucumber slices, or steamed green beans on the side. Spoon it over a bed of arugula or mixed greens for a hearty salad bowl. Stuff leftovers into lettuce cups or into a toasted baguette for a quick, no fuss sandwich style meal.

How to store

Fridge: Store the salad in an airtight container in the refrigerator for up to 3 days.
Freezer: Skip freezing, since potatoes and tuna change texture and lose quality after thawing.
Refresh before serving: Stir the salad, then add a splash of olive oil and a squeeze of lemon to wake up the flavors.
Best way to serve again: Serve it chilled or let it sit at room temperature for 15 to 20 minutes; avoid reheating, since heat can dry out the tuna and soften the potatoes too much.