Fresh Tuna Crostini

By AislePrompt Test Kitchen · Reviewed by AislePrompt Editorial · ·

Crispy bread topped with seared tuna, avocado, and a zesty lemon-herb sauce for a refreshing appetizer or light dinner. This japanese-inspired seafood ready in about 27 minutes pairs day-old bread, (4 oz), drained tuna, medium, mashed avocado for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 280 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.

★ 3.8 (12 ratings) Prep: 15 min Cook: 12 min Serves 4 Japanese cuisine 280 cal/serving
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Ingredients

Instructions

  1. Step 1: Preheat oven to 350°F (175°C). Brush 4 slices of day-old bread with 1 tbsp olive oil and place on a baking sheet. Bake for 10-12 minutes until golden and crisp.
  2. Step 2: In a small bowl, combine 1 can drained tuna, 1 mashed avocado, 1 tbsp chopped dill, 1/4 tsp salt, and 1/8 tsp black pepper. Mix until smooth.
  3. Step 3: Spread the tuna-avocado mixture evenly over the toasted bread slices. Garnish with lemon zest and a drizzle of lemon juice. Serve immediately.

Equipment for this recipe

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Frequently asked questions

How long does Fresh Tuna Crostini take to make?

Total time is about 27 minutes (15 min prep + 12 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 Fresh Tuna Crostini?

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 day-old bread from drying out.

Can I substitute ingredients in Fresh Tuna Crostini?

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 Fresh Tuna Crostini 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 Fresh Tuna Crostini?

Japanese 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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