The Most Flavorful Tuna Nicoise

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

A refreshing French salad with grilled tuna, green beans, potatoes, and a garlic-herb vinaigrette. This French-inspired seafood recipe, ready in about 70 minutes, pairs tuna steaks, red potatoes, green beans for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 400 calories and feeds 4, 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: 30 min Cook: 40 min Serves 4 French cuisine 400 cal/serving
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Ingredients

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Instructions

  1. Step 1: Preheat grill to medium-high. Season 4 tuna steaks with salt and pepper. Grill for 3-4 minutes per side until seared and flaky.
  2. Step 2: Toss 1 lb red potatoes with 2 tbsp olive oil and 1 tsp thyme. Roast at 400°F (200°C) for 25 minutes, stirring halfway.
  3. Step 3: Sauté 3 minced garlic cloves in 2 tbsp olive oil until fragrant. Whisk in 1 tbsp Dijon mustard and 1 tbsp red wine vinegar. Toss with 1 lb green beans and serve alongside the tuna and potatoes.

Frequently asked questions

How long does The Most Flavorful Tuna Nicoise take to make?

Total time is about 70 minutes (30 min prep + 40 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 The Most Flavorful Tuna Nicoise?

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 The Most Flavorful Tuna Nicoise?

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 The Most Flavorful Tuna Nicoise 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 The Most Flavorful Tuna Nicoise?

French seafood 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.

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