Niçoise Salad with Seared Tuna and Green Beans

By AislePrompt Test Kitchen · Reviewed by AislePrompt Editorial · ·

A vibrant, balanced salad featuring seared tuna, crisp green beans, olives, and hard-boiled eggs dressed with a tangy Dijon vinaigrette. This french-inspired salads ready in about 35 minutes pairs fresh tuna steak, trimmed green beans, halved small new potatoes into a side that holds its own next to almost any main — bright, balanced, and quick enough to slot into a weeknight plate. Each serving lands at about 380 calories and feeds 4, so it slots cleanly next to roasted proteins, grain bowls, or weeknight mains. 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 Cook: 15 min Serves 4 French cuisine 380 cal/serving
Plan a meal with the AI → Shop this recipe on Instacart → Shop equipment ↓

Ingredients

Instructions

  1. Step 1: Place 3 large eggs in a pot of cold water, bring to a boil, and cook for 10 minutes for hard-boiled eggs. Transfer to cold water, peel, and quarter.
  2. Step 2: In a medium pot, boil 8 oz trimmed green beans and 8 halved small new potatoes for 8 minutes until tender but firm. Drain and cool.
  3. Step 3: Whisk together 1 tbsp Dijon mustard, 2 tbsp red wine vinegar, 1 minced garlic clove, 1 tsp salt, and 1/2 tsp black pepper in a bowl. Slowly drizzle in 1/4 cup extra virgin olive oil while whisking to emulsify the dressing.
  4. Step 4: Heat a nonstick skillet over high heat. Season 12 oz fresh tuna steak with salt and pepper. Sear for 1.5 minutes per side for medium-rare. Remove and let rest for 3 minutes, then slice into 1/4-inch thick pieces.
  5. Step 5: In a large bowl, toss 4 cups mixed salad greens, cooled green beans, potatoes, 1 cup halved cherry tomatoes, and 1/2 cup pitted Kalamata olives with half the dressing.
  6. Step 6: Arrange salad on plates topped with sliced tuna and quartered eggs. Drizzle remaining dressing and squeeze 1 lemon wedge over the tuna before serving.

Equipment for this recipe

Top-rated tools to make this recipe successfully.

More Knives & cutting boards → Shop all kitchen tools →

Frequently asked questions

How long does Niçoise Salad with Seared Tuna and Green Beans take to make?

Total time is about 35 minutes (20 min prep + 15 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 Niçoise Salad with Seared Tuna and Green Beans?

Cool to room temperature within 2 hours, then store in an airtight container in the fridge for up to 4 days. Reheat covered in a 350°F oven for 10-12 minutes, or microwave at 70% power in 60-second bursts to keep fresh tuna steak from drying out.

Can I substitute ingredients in Niçoise Salad with Seared Tuna and Green Beans?

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 Niçoise Salad with Seared Tuna and Green Beans for a different number of people?

The recipe is written for 4 servings. Multiply each ingredient by (your serving target / 4). 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.

What goes well with Niçoise Salad with Seared Tuna and Green Beans?

French salads like this pair well with a simple grain (rice, couscous, or crusty bread), a quick salad with acid (lemon vinaigrette, pickled onions), and a pan sauce or yogurt-based dip. Tap "Plan a meal with the AI" to get specific side suggestions.