Shareable Tuna Niçoise Salad Jars with Hard-Boiled Eggs and Cherry Tomatoes

By , Test Kitchen Director · Reviewed by AislePrompt Editorial · ·

Layered mason jar salads with tender tuna, crisp veggies, and a tangy mustard dressing for easy meal prep. This French-inspired salad recipe (vegetarian), ready in about 20 minutes, pairs canned tuna, hard-boiled eggs, cherry tomatoes for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 410 calories and feeds 2, so it slots cleanly into a weekly meal plan and pairs well with a quick salad or grain on the side. Tap "Plan a meal with the AI" below to drop this recipe into your week and send the ingredients straight to Instacart. Nutrition values are approximate, calculated from USDA FoodData Central (fdc.nal.usda.gov) — verify against ingredient labels for any health-driven dietary plan.

Prep: 20 min Serves 2 French cuisine 410 cal/serving
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Ingredients

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Instructions

  1. Step 1: Drain tuna, flake into a bowl, and mix with 1 tbsp Dijon mustard, 1 tbsp white wine vinegar, and 1/2 tsp lemon zest.
  2. Step 2: Peel and slice hard-boiled eggs into halves. Combine with cherry tomatoes, cucumber, and red onion in a separate bowl.
  3. Step 3: Layer jars starting with dressing: pour 1 tbsp olive oil, 1 tbsp vinegar, 1 tbsp Dijon, and 1/2 tsp lemon zest into the bottom of each jar.
  4. Step 4: Add tuna mixture on top of dressing, then layer vegetables on top. Seal and refrigerate up to 3 days; shake well before eating to combine.

Frequently asked questions

How long does Shareable Tuna Niçoise Salad Jars with Hard-Boiled Eggs and Cherry Tomatoes take to make?

Total time is about 20 minutes (20 min prep + 0 min cook). Most home cooks find this fits comfortably into a weeknight; double the batch on Sunday for two dinners.

How do I store leftover Shareable Tuna Niçoise Salad Jars with Hard-Boiled Eggs and Cherry Tomatoes?

Refrigerate in a covered airtight container for up to 3–4 days (FDA FoodKeeper guideline for cooked fish). Store any fresh salsa or citrus-based garnish in a separate container — it keeps for up to 2 days. Freeze cooked fish (without fresh garnishes) for up to 3 months; thaw overnight in the fridge and reheat gently at 275°F until just warmed through to preserve texture.

Can I substitute ingredients in Shareable Tuna Niçoise Salad Jars with Hard-Boiled Eggs and Cherry Tomatoes?

Yes — most ingredients in this recipe have flexible swaps. For oil, use any neutral high-smoke-point oil (avocado, grapeseed, refined coconut). For aromatics, dried herbs at ⅓ the volume of fresh work in a pinch. The full ingredient list is shoppable on Instacart so you can see substitutes in real time.

How do I scale Shareable Tuna Niçoise Salad Jars with Hard-Boiled Eggs and Cherry Tomatoes for a different number of people?

The recipe is written for 2 servings. Multiply each ingredient by (your serving target / 2). Cook time stays roughly the same up to 2x; for 3-4x batches, switch from a skillet to a sheet pan or stockpot so the food isn't crowded — overcrowding steams instead of browns.

Is Shareable Tuna Niçoise Salad Jars with Hard-Boiled Eggs and Cherry Tomatoes vegetarian?

Yes — this recipe is tagged vegetarian based on its ingredient list. Always cross-check labels for packaged ingredients (sauces, broths, condiments) since formulations vary by brand.

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