I made this for the first time on a night I had zero energy and even less in the fridge.
One can of tuna. Half a cucumber. Some random sauce ingredients I threw together out of pure desperation.
Fifteen minutes later I was eating something that actually tasted intentional. 🙂
That’s the whole story of this salad. It looks like something you’d order at a cute lunch spot, but it’s really just a few humble ingredients doing a lot of heavy lifting.
Here’s everything you need to make it your own.
Recipe at a Glance
| Detail | Info |
|---|---|
| Prep time | 15 minutes |
| Cook time | 0 minutes |
| Total time | 15 minutes |
| Servings | 2 as a main, 4 as a side |
| Difficulty | Beginner friendly |
| Diet | Naturally gluten free, easy to make low carb |
What You’ll Need
For the salad:
- 2 cans (5 oz each) tuna in olive oil or water, drained
- 1 large English cucumber, diced
- 1/2 small red onion, thinly sliced
- 1 cup cherry tomatoes, halved
- 1/4 cup fresh dill, chopped (or parsley if you’re not a dill person)
- 1 tbsp capers, drained
For the dressing:
- 3 tbsp olive oil
- 1 tbsp red wine vinegar
- 1 tsp Dijon mustard
- 1 small garlic clove, minced
- Salt and black pepper to taste
- A pinch of red pepper flakes (optional, but I always add it)
Tools You’ll Need
- A large mixing bowl
- A small bowl or jar for the dressing
- A sharp knife and cutting board
- A whisk or fork
- Measuring spoons
How to Make It
- Drain your tuna well. Press it gently with a fork so you’re not left with a watery salad.
- Dice the cucumber and halve the tomatoes. Small, even pieces mean every bite has a bit of everything.
- Thinly slice the red onion. If raw onion is too sharp for you, soak the slices in cold water for 10 minutes first. It mellows them out fast.
- Whisk the dressing. Combine the olive oil, vinegar, mustard, garlic, salt, pepper, and red pepper flakes in a small bowl until it looks smooth and slightly thick.
- Combine everything. In your large bowl, add the tuna, cucumber, tomatoes, onion, dill, and capers.
- Pour the dressing over the top. Toss gently so the tuna doesn’t turn to mush.
- Taste and adjust. Add more salt, a squeeze of lemon, or extra pepper flakes depending on your mood.
Serve right away, or let it chill in the fridge for 20 minutes so the flavors settle in.
Pro Tips
- Salt your cucumbers first. Toss the diced cucumber with a small pinch of salt and let it sit in a colander for 10 minutes. This pulls out extra water so your salad doesn’t get watery by the time you’re done eating.
- Don’t skip draining the tuna. This is the one step people rush, and it’s the reason so many tuna salads end up soggy.
- Use good tuna. This recipe has so few ingredients that the quality of your tuna really shows. Splurge on the good stuff if you can.
- Let it rest before serving. Five to ten minutes in the fridge lets the dressing soak into everything. It genuinely tastes better after a short rest.
- Double the dressing if you’re meal prepping. The cucumbers release liquid over time, and extra dressing helps balance that out on day two.
Substitutions and Variations
Here’s how to make this salad your own:
- No tuna? Canned salmon or cooked, shredded chicken both work well.
- Not a fan of raw onion? Swap in thinly sliced green onion for something milder.
- Want it creamier? Stir in 2 tablespoons of Greek yogurt or mayo along with the dressing.
- Need it dairy free or vegan? Skip the tuna and use chickpeas instead. It’s a completely different dish, but it’s just as good.
- Want more crunch? Add diced celery or bell pepper.
- Low carb or keto? This recipe is already there. Just double check your mustard for added sugar.
Make-Ahead Tips
This salad actually holds up better than you’d think.
You can prep the vegetables and dressing separately up to 2 days ahead. Store them in separate containers, and combine everything with the tuna right before serving.
If you’re prepping the full salad in advance, add the dressing about 30 minutes before eating instead of right after mixing. It keeps the cucumbers from getting too soft.
A Few Extra Details
Nutritional snapshot (per serving, based on 2 servings total):
- Calories: around 320
- Protein: 28g
- Carbs: 9g
- Fat: 20g
This will shift depending on the tuna you use and how heavy handed you are with the olive oil.
Meal pairing ideas:
- Serve it over a bed of greens for a bigger meal
- Stuff it into a pita or wrap for lunch
- Pair it with crusty bread and a simple soup for dinner
- Serve it alongside grilled corn for a summer plate
Time saving tip: Dice your cucumber and onion the night before and store them in the fridge. Morning-of, you’re just opening cans and whisking a dressing.
Leftovers and Storage
Store leftovers in an airtight container in the fridge for up to 3 days.
The cucumbers will soften a bit over time, which is completely normal. If the salad seems watery on day two, just drain off the excess liquid before serving.
This salad doesn’t freeze well, so I’d stick to making just enough for a few days.
FAQ
Can I use fresh tuna instead of canned?
Yes. Sear a fresh tuna steak, let it cool, then dice or flake it into the salad.
Is this salad good for meal prep?
Very much so. Just keep the dressing separate until you’re ready to eat if you’re prepping more than a day ahead.
Can I make this without mustard?
Yes, though it does help emulsify the dressing. A small spoon of mayo works as a substitute.
What can I serve this with for a full dinner?
Try it with roasted potatoes, a slice of crusty bread, or over rice for something more filling.
Can kids eat this?
Absolutely. Just leave out the red pepper flakes and go lighter on the raw onion if your kids are picky about sharper flavors.
Wrapping Up
This is the kind of recipe that quietly becomes a regular in your kitchen.
It’s fast, it barely dirties any dishes, and it tastes like you put in way more effort than you actually did.
Give it a try this week, and let me know in the comments how it turned out for you. I’d love to hear what substitutions you tried, or if you added your own twist to it. 🥒
