Tuna Carpaccio with Basil Oil, Lemon and Caper Berries

Bright, elegant, and impossibly simple, Tuna Carpaccio with Basil Oil, Lemon and Caper Berries is the kind of starter that looks like you worked all afternoon in the kitchen when in reality it takes just minutes to assemble. I love serving this when the weather turns warm and guests want something refreshing and light. The vivid ruby of the tuna, the peppery bite of arugula, the citrus lift from lemons, and the punchy pop of caper berries create contrasts that sing on every forkful.

Why this recipe works

This preparation focuses on clean, high-quality components. A whole 600 grams tuna fillet is sliced paper-thin, so texture matters: the fish should be fresh, firm, and sashimi-grade. Homemade pesto becomes a silky basil oil when thinned with extra virgin olive oil, adding herbaceous richness without overpowering the tuna. Lemon juice brightens everything and caper berries offer a briny, rounded burst that is gentler than ordinary capers. A handful of arugula adds pepper and crunch, and simple finishing touches of sea salt flakes and freshly ground black pepper bring it all together.

Ingredients

• 600 grams whole tuna fillet
• caper berries (to taste; about 10–15 berries for 4 servings)
• 2-3 lemons
• homemade pesto (use your favorite basil-based pesto; see note)
• 50 grams arugula leaves
• olive oil extra virgin (for basil oil and finishing)
• sea salt flakes (to taste)
• black pepper freshly ground (to taste)

Note: For the pesto, a simple blend of fresh basil leaves, pine nuts or a nut substitute, a little grated cheese or a dairy-free alternative, garlic, and extra virgin olive oil works perfectly. If you prefer a lighter drizzle, blend the pesto with additional extra virgin olive oil until fluid.

Equipment

• Sharp chef’s knife or slicer
• Cutting board
• Mixing bowl or small blender for basil oil
• Serving platter or chilled plates
• Tongs or small offset spatula

Prep tips

• Keep the tuna cold until you are ready to slice. For ultra-thin slices, place the fillet in the freezer for 15–20 minutes to firm up, then use a long, sharp knife and slice against the grain.
• Use fresh lemons: their juice has the best brightness and acidity.
• If you buy store-bought pesto, thin it with extra virgin olive oil to reach a dressing-like consistency for easy drizzling.

Flavor variations

• Add thinly sliced fennel for an aniseed crunch.
• Swap arugula for baby spinach or watercress if you prefer a milder green.
• Finish with a few shavings of aged cheese or a light dusting of toasted sesame seeds for a nutty note.

Step-by-step recipe

Below are clear, sequential steps so you can follow along confidently. These directions keep the same ingredient amounts listed above and are written to be easy to execute.

1. Prepare the tuna: Pat the 600 grams whole tuna fillet dry with paper towels. If the fillet is very cold, let it sit for 5 minutes at room temperature; if it seems soft, place it in the freezer for 15–20 minutes to firm up so that you can slice it thinly.
2. Slice the tuna: Using a very sharp knife, slice the tuna as thinly as possible against the grain. Aim for translucent, even slices about 2–3 millimetres thick. Arrange the slices in a single layer on a chilled platter or divide them across serving plates, slightly overlapping each piece in a circular fan or linear row.
3. Make basil oil: In a small blender or bowl, combine approximately 2–3 tablespoons of homemade pesto with 3–4 tablespoons extra virgin olive oil. Whisk or blend until smooth and pourable. Taste and adjust—if you want a milder herbal note, add more oil; for a sharper basil presence, use more pesto.
4. Prepare lemon: Cut 2 lemons in half and squeeze to extract fresh juice. Reserve additional lemon wedges if you like a brighter finish at the table. Use about 1–2 tablespoons of juice to dress the dish initially; keep extra on hand for guests.
5. Dress the tuna: Drizzle the basil oil sparsely over the arranged tuna slices, aiming for a light coating that adds flavor without weighing the fish down. Next, scatter a few teaspoons of fresh lemon juice evenly across the tuna to add brightness. Taste as you go to avoid over-acidifying the fish.
6. Add caper berries and arugula: Scatter caper berries across the tuna; use about 10–15 berries for four portions, or adjust to taste. Place the 50 grams arugula leaves either in the center of the platter or in small piles next to the tuna slices to add peppery contrast and visual freshness.
7. Finish with olive oil and seasoning: Drizzle a little more extra virgin olive oil over the entire plate for sheen and richness. Sprinkle sea salt flakes sparingly over the tuna—these flakes provide texture and bursts of salinity. Grind fresh black pepper over the top to your taste.
8. Final adjustments and serve: Taste one slice and adjust with a few additional drops of lemon juice, a tiny pinch of sea salt flakes, or another light drizzle of basil oil if needed. Serve immediately so the tuna is enjoyed at its freshest. Offer extra lemon wedges and caper berries at the table.

Plating and presentation

For a restaurant-style look, arrange the tuna in concentric circles or in neat rows. Place arugula either in the center as a bed or in small, artful piles. Scatter caper berries and finish with delicate flakes of sea salt and a few turns of freshly ground black pepper. A final drizzle of basil oil just before serving makes the colors pop and the flavors meld.

Make-ahead and storage

This dish is best enjoyed immediately after assembly. If you must prepare early, slice the tuna and keep the slices covered and chilled for no more than 2 hours. Keep basil oil and lemon juice separate until final assembly to preserve texture and brightness.

Serving suggestions

• Serve with thin, crusty bread or toasted crostini to soak up the oil and juices.
• A crisp white wine or a citrus-forward sparkling wine pairs beautifully.
• Offer a simple green salad or roasted asparagus on the side for a fuller meal.

Notes on ingredients and substitutions

• If you cannot find caper berries, small green olives can provide a similar briny element, though caper berries have a milder, rounded flavor.
• For a nut-free pesto, replace pine nuts with toasted sunflower seeds or omit them altogether and increase the oil slightly for texture.
• If you prefer a dairy-free option, use a pesto made without cheese, or substitute a grated dairy-free alternative.

Wrap-up

Tuna Carpaccio with Basil Oil, Lemon and Caper Berries is proof that a handful of high-quality ingredients can produce something spectacular. It’s a quick, elegant starter that showcases fresh tuna with herbaceous oil, bright lemon, and the satisfying tang of caper berries. Once you try it, this will become a go-to for dinner parties, warm evenings, or any time you want an effortlessly refined dish.

Enjoy the clarity of flavors and the effortless beauty of this plate—delicate tuna, fragrant basil oil, zesty lemon, and briny caper berries, all coming together in a dish that looks like a chef’s special but takes almost no time at all.