Classic Tuna and Potato Salad Recipe for Picnic Meals

Delicious Tuna Potato Salad dressed with a bright, tangy lemon vinaigrette. Buttery baby potatoes combine with flaky tuna, capers and whole-grain mustard for a simple, protein-packed dish that’s ready in 20 minutes.

Why Make This Tuna Potato Salad

This salad is full of protein from the tuna and bright flavor from lemon, capers and fresh herbs. Small, halved baby potatoes cook quickly and turn tender and buttery, while the lemon dressing keeps the dish light. It’s a reliable crowd-pleaser for casual lunches, potlucks or weeknight sides.

The recipe comes together fast — prep and cook in about 20 minutes — and stores well in the refrigerator for several days, making it convenient for meal prep.

Ingredients Needed

Potatoes. Baby red potatoes and Yukon golds work well; fingerlings are a good alternative.

Canned tuna. Choose a quality tuna you like (albacore or skipjack). Drain and briefly rinse tuna packed in water to reduce salt and remove excess liquid.

Capers. Capers in brine add a bright, salty pop that complements the tuna.

Whole-grain mustard. Gives texture and tang; Dijon or mayonnaise can be substituted if preferred.

Seasonings and aromatics. Lemon zest and juice, olive oil, minced garlic, dried dill, dried basil, salt and pepper. Fresh cilantro or parsley adds a fresh finish.

Full measurements are provided in the recipe card below.

Recipe Variations

Potatoes. If using larger Yukon golds, cut them into bite-sized pieces so they cook evenly.

Tuna alternatives. Swap albacore for skipjack to reduce mercury exposure, or use canned salmon or canned chicken for a different flavor.

Onions. Red onion gives bite; substitute with white onion or scallions for a milder profile.

Dressing. Substitute Dijon or mayonnaise for whole-grain mustard, or add a touch of honey for balance.

Mix-ins. Try diced red bell pepper, toasted pine nuts or pumpkin seeds, or chopped sun-dried tomatoes for texture and color.

Steps To Make This Recipe

Step One. In a large pot bring water to a boil. While waiting, wash the potatoes and cut them in half so they’re bite-sized. Whisk together the lemon dressing in a small bowl (lemon zest, lemon juice, olive oil, mustard, garlic, dried herbs, salt and pepper).

Step Two. Add the potatoes to the boiling water with a generous pinch of salt. Boil 10–14 minutes, until they’re tender when pierced with a fork. Drain and let cool briefly, then rinse with cold water to stop cooking.

Step Three. Drain and gently rinse the canned tuna, then press lightly to remove excess liquid.

Step Four. In a large serving bowl combine the cooled potatoes, drained tuna, thinly sliced red onion, capers and the lemon dressing. Toss gently to combine and adjust seasoning to taste. Garnish with chopped fresh cilantro or parsley if desired.

Store leftovers in an airtight container in the refrigerator for up to 4 days. If the potatoes absorb too much dressing over time, refresh the salad with a bit more mustard and olive oil before serving. Freezing is not recommended.

Recipe FAQs

Recipe Tips

Make-ahead tip: Cook and cool the potatoes ahead of time, then store separately. Toss with the lemon dressing and tuna just before serving so the potatoes stay firm and the flavors remain bright.

Flavor boosts: Add chopped red bell pepper, toasted seeds or sun-dried tomatoes for extra texture and color. Fresh herbs like parsley or cilantro add freshness at the end.

Recipe Pairings

This salad works well as a light lunch on its own or as a side alongside grilled or roasted proteins. It pairs nicely with grilled chicken, turkey burgers, BBQ chicken thighs or a fresh green salad.

Other Side Dish Recipes To Enjoy

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If you enjoyed this recipe, I’d love to hear about it — leave a comment and share how you served it.