Tonic Tuna Tartlets

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

A refreshing seafood appetizer with a tangy citrus glaze and crispy pastry shells. This quick recipe, ready in about 35 minutes, layers pastry sheets, tuna, avocado into a dessert worth slowing down for — great for weekend baking, holiday tables, or any time you want a sweet payoff at the end of a meal. Each serving lands at about 220 calories and feeds 6, so it slots into a weekend bake or a special-occasion dessert tray. 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 6 220 cal/serving
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Ingredients

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Instructions

  1. Step 1: Preheat oven to 375°F (190°C). Roll out 1 thawed pastry sheet into a 12-inch rectangle. Cut into 6 equal squares.
  2. Step 2: Brush each square with 1 tbsp olive oil and bake for 10-12 minutes until golden. Remove and let cool slightly.
  3. Step 3: In a bowl, mix 5 oz drained tuna, 1/2 mashed avocado, 1 tbsp lemon zest, 1 tbsp lemon juice, 1 tbsp chopped dill, 1/4 tsp salt, and 1/4 tsp black pepper until well combined.
  4. Step 4: Spoon 1 tbsp tuna mixture into each pastry shell. Bake for 5 minutes until the top is lightly toasted.
  5. Step 5: Let cool completely before serving. Garnish with additional dill and lemon zest.

Frequently asked questions

How long does Tonic Tuna Tartlets take to make?

Total time is about 35 minutes (20 min prep + 15 min cook). Most home bakers find this fits a weekend afternoon; chill or store as the recipe directs before serving.

How do I store leftover Tonic Tuna Tartlets?

Cool fully before storing. Most baked desserts keep at room temperature in an airtight container for 2–3 days, or in the fridge for up to 5 days. Cream- or custard-based desserts must go in the fridge within 2 hours; reheat gently or serve cold per the recipe.

Can I substitute ingredients in Tonic Tuna Tartlets?

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 Tonic Tuna Tartlets for a different number of people?

The recipe is written for 6 servings. Multiply each ingredient by (your serving target / 6). 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 should I serve with Tonic Tuna Tartlets?

Serve it with a simple grain (rice, quinoa, or crusty bread), a quick green salad, and a steamed or roasted vegetable. Tap "Plan a meal with the AI" above for dish-specific pairings based on what you have on hand.

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