Pasta al Tonno with Lemon, Capers, and Chili

Why You’ll Love This Recipe

• Packed with flavor from pantry staples: good tuna, capers, garlic, and chili.
• Bright, fresh finish from parsley and lemon zest—no heaviness.
• 30-minute weeknight dinner that tastes like a coastal Italian trattoria.
• Flexible and forgiving: adjust heat, herbs, and texture to your taste.

Grocery List

• Produce: Garlic, flat-leaf parsley, 1 lemon
• Dairy: None required (optional: finely grated Pecorino or Parmesan for serving, not traditional)
• Pantry: Spaghetti, extra-virgin olive oil, tuna in olive oil, red pepper flakes, capers, crushed tomatoes, kosher salt, black pepper

Full Ingredients

Pasta

• 12 oz (340 g) spaghetti
• 4 qt (3.8 L) water
• 2 tbsp kosher salt (for the boiling water)

Sauce

• 2 tbsp extra-virgin olive oil
• 1 tbsp oil reserved from the tuna cans
• 4 garlic cloves, thinly sliced
• 1/2 tsp red pepper flakes (use more to taste)
• 2 tbsp capers, rinsed and roughly chopped
• 1 (14 oz/400 g) can crushed tomatoes (or passata)
• 1/2 tsp kosher salt, plus more to taste
• 1/4 tsp freshly ground black pepper
• Optional: 1/3 cup (80 ml) dry white wine (to deglaze)

Tuna & Finishing

• 2 (5 oz/142 g) cans tuna in olive oil, drained and flaked (reserve 1 tbsp oil for the pan)
• 1/2 cup (15 g) flat-leaf parsley, finely chopped
• 1 tsp finely grated lemon zest
• 1 tbsp fresh lemon juice
• Extra-virgin olive oil, for drizzling
• Additional red pepper flakes, to taste

Step-by-Step Instructions

Step 1: Bring the pasta water to a boil

Fill a large pot with 4 qt (3.8 L) water and bring to a rolling boil. Add 2 tbsp kosher salt to season the water so the pasta is flavorful from the inside out.

Step 2: Build a garlicky, chili-studded base

In a large, wide skillet, warm 2 tbsp olive oil and 1 tbsp reserved tuna oil over medium heat. Add the sliced garlic and sauté 1–2 minutes until just turning light gold at the edges—avoid browning. Sprinkle in the red pepper flakes and the chopped capers; stir for 30 seconds until fragrant. If using white wine, pour it in and simmer 60–90 seconds, scraping up any flavorful bits until the alcohol smell dissipates.

Step 3: Add tomatoes and simmer

Stir in the crushed tomatoes, 1/2 tsp kosher salt, and 1/4 tsp black pepper. Simmer over medium-low, stirring occasionally, for 8–10 minutes until the sauce thickens slightly and the oil begins to rise to the surface. Taste and adjust salt or heat as needed. Keep the sauce at a gentle bubble.

Step 4: Cook the spaghetti and save some starchy water

Add the spaghetti to the boiling water and cook according to package directions until 1 minute shy of al dente (usually 8–9 minutes). Before draining, reserve 1 cup (240 ml) pasta cooking water. Drain the pasta well.

Step 5: Fold in tuna and emulsify the sauce

Gently fold the flaked tuna into the tomato sauce and warm for 30–60 seconds; avoid breaking it up too much. Add the drained spaghetti to the skillet and toss vigorously, splashing in reserved pasta water a little at a time until the sauce turns glossy and coats the strands (start with 1/3 cup and add more as needed). Off the heat, stir in the chopped parsley, lemon zest, and lemon juice. Taste and adjust salt, pepper, and chili.

Step 6: Plate and finish

Twirl the pasta into warm bowls. Drizzle with a little extra-virgin olive oil and finish with a pinch of red pepper flakes and a scatter of parsley. Serve immediately while silky and hot.

Pro Tips

• Use tuna packed in olive oil—it is more flavorful and stays tender. The reserved oil adds savoriness to the sauce.
• Keep garlic pale gold, not brown, to avoid bitterness.
• Reserve plenty of pasta water; the starch helps the sauce cling and turn glossy.
• Fold tuna in at the end so it warms gently and stays in pleasant flakes.
• Capers are salty: season the sauce after simmering to avoid oversalting.

Variations

• Bianco (no tomato): Skip tomatoes and use 1/4 cup extra olive oil, more lemon zest/juice, and plenty of pasta water for a silky, garlicky emulsion.
• Puttanesca-style: Add 2 chopped anchovy fillets and 1/3 cup sliced olives with the capers for deeper briny flavor.
• Spicy Calabrian: Swap red pepper flakes for 1–2 tsp chopped Calabrian chili paste and top with toasted breadcrumbs for crunch.

Storage & Make-Ahead

This pasta is best right after cooking. Leftovers keep in an airtight container in the refrigerator for up to 2 days. Reheat gently on the stovetop with a splash of water to loosen. For make-ahead, simmer the tomato–garlic–caper base up to 3 days ahead; reheat, then add tuna and finish with parsley and lemon just before serving.

Nutrition (per serving)

Approx. 520 calories; 27 g protein; 62 g carbohydrates; 17 g fat; 4 g fiber; 720 mg sodium. Values are estimates and will vary with brands and salt levels.