Sardines Plaki (Σαρδέλες πλακί) — Baked sardines with tomato and onion
Sardines plaki is a classic Greek oven dish where oily fish bakes gently in a garlicky tomato-onion sauce with herbs and olive oil. It’s a beloved taverna-style preparation that highlights the Aegean’s seafood and simple pantry flavors.
Printable Recipe Card
Servings: 4 · Total: 55 min · Difficulty: easy
Ingredients (quick list)
- 800 g fresh sardines, cleaned and butterflied (about 12–16 medium sardines)
- 6 g fine sea salt
- 1 tsp black pepper, freshly ground
- 60 ml extra-virgin olive oil (plus 5 ml to grease the dish)
- 250 g yellow onion, thinly sliced
- 12 g garlic cloves, thinly sliced (about 3 medium cloves)
- 500 g ripe tomatoes, grated (or crushed tomatoes)
- 20 g tomato paste
- 60 ml dry white wine (optional but traditional in many homes)
- 60 ml water
- 15 ml red wine vinegar
- 2 tsp dried oregano
+ 3 more in the full ingredients section below.
Steps (summary)
- Heat the oven to 200°C and position a rack in the middle. Lightly grease a 30×20 cm baking dish with 5 ml olive oil so the onio…
- Pat the sardines dry with paper towels, then lay them on a tray. Season evenly with the salt and black pepper, and set them asi…
- Spread the sliced onion across the baking dish in an even layer, then scatter the sliced garlic over it. Drizzle 30 ml of the o…
- In a bowl, stir together the grated tomatoes, tomato paste, white wine, water, vinegar, oregano, and bay leaf until the paste d…
- Arrange the sardines on top of the saucy onion layer in a single, slightly overlapping row, skin-side up if butterflied. Drizzl…
- Bake for 25–30 minutes, until the onions are tender and the sauce is bubbling around the edges. The sardines should be opaque a…
+ 1 more steps in the full instructions section below.
Cultural Background
Plaki-style baking is a hallmark of Greek home cooking, pairing olive oil, tomatoes, onions, and herbs with seafood in a single pan. Sardines are especially prized in coastal communities for being affordable, nutritious, and deeply tied to taverna culture.
Equipment
💡 Tips
- Choose very fresh sardines: clear eyes and a clean sea smell make the finished dish sweet and not overly fishy.
- Keep the bake short; sardines dry quickly, so pull them as soon as the flesh turns opaque and flakes easily.
- If the tomatoes are watery, reduce the added water to 30 ml to keep the plaki sauce thick and glossy.
⚠️ Common Mistakes
❌ Overbaking the sardines until they turn dry and chalky.
✅ Fix: Bake just until opaque and flaky, then rest 5 minutes; use a brief broil only for color at the end.
❌ Using watery tomatoes that leave a thin, soupy sauce.
✅ Fix: Use ripe, meaty tomatoes or crushed tomatoes, and reduce the added water to 30 ml if needed.
❌ Skipping the olive oil drizzle, leading to dull flavor and sticking.
✅ Fix: Measure the olive oil and drizzle over both onions and fish so the dish bakes glossy and releases easily.
🧊 How to Store
Cool leftovers to room temperature within 1 hour, then refrigerate airtight for up to 2 days. Reheat covered in a 160°C oven for 10–12 minutes with 15 ml water added to the dish, or enjoy at cool room temperature as a meze.
📅 Make Ahead
Slice the onions and garlic up to 24 hours ahead and refrigerate airtight. Mix the tomato sauce base up to 12 hours ahead; bake the sardines just before serving for the best texture and sheen.
🍽️ Pairs Well With
- Crusty village bread
- boiled potatoes with olive oil and oregano
- horiatiki salad
- olives
- roasted peppers
Regional Variations
- Aegean islands: add 30 g capers and 80 g halved Kalamata olives for a brinier, meze-like version.
- Northern Greece: include 150 g thinly sliced potatoes under the onions and increase cook time by 10–15 minutes until tender.
- Taverna-style: finish with 5 g chopped fresh dill alongside parsley for a greener, more aromatic sauce.
Ingredients
- 800 gfresh sardines, cleaned and butterflied (about 12–16 medium sardines)
- 6 gfine sea salt
- 1 tspblack pepper, freshly ground
- 60 mlextra-virgin olive oil (plus 5 ml to grease the dish)
- 250 gyellow onion, thinly sliced
- 12 ggarlic cloves, thinly sliced (about 3 medium cloves)
- 500 gripe tomatoes, grated (or crushed tomatoes)
- 20 gtomato paste
- 60 mldry white wine (optional but traditional in many homes)
- 60 mlwater
- 15 mlred wine vinegar
- 2 tspdried oregano
- 1 leafbay leaf
- 15 gflat-leaf parsley, chopped (about 1 small bunch)
- 1lemon, cut into wedges
🔄 Substitutions
- fresh sardines, cleaned and butterflied→ fresh mackerel fillets
- dry white wine→ water plus 10 ml extra red wine vinegar
- red wine vinegar→ lemon juice
Instructions
- 1
Heat the oven to 200°C and position a rack in the middle. Lightly grease a 30×20 cm baking dish with 5 ml olive oil so the onions don’t stick and burn at the edges.
- 2
Pat the sardines dry with paper towels, then lay them on a tray. Season evenly with the salt and black pepper, and set them aside while you build the tomato-onion base so the seasoning adheres.
- 3
Spread the sliced onion across the baking dish in an even layer, then scatter the sliced garlic over it. Drizzle 30 ml of the olive oil over the onions and toss lightly in the dish so the onions start softening as they bake.
- 4
In a bowl, stir together the grated tomatoes, tomato paste, white wine, water, vinegar, oregano, and bay leaf until the paste dissolves. Pour this mixture over the onions, then shake the dish gently so the sauce settles into an even layer.
- 5
Arrange the sardines on top of the saucy onion layer in a single, slightly overlapping row, skin-side up if butterflied. Drizzle the remaining 30 ml olive oil over the fish so the skins blister lightly and the flesh stays moist.
- 6
Bake for 25–30 minutes, until the onions are tender and the sauce is bubbling around the edges. The sardines should be opaque and just cooked through; if you want more color, broil for 1–2 minutes while watching closely to prevent drying.
- 7
Rest the dish for 5 minutes so the sauce thickens slightly and the fish reabsorbs some juices. Sprinkle with the chopped parsley and serve with lemon wedges, spooning the tomato-onion sauce over each portion.
🪪 Recipe Passport
Cultural Background
Plaki-style baking is a hallmark of Greek home cooking, pairing olive oil, tomatoes, onions, and herbs with seafood in a single pan. Sardines are especially prized in coastal communities for being affordable, nutritious, and deeply tied to taverna culture.
Regional Variations
Researched from multiple sources and validated by the Zaffaron editorial team. Every recipe is tested for accuracy, measurements, and cultural authenticity.
Nutrition per serving
Pairs well with
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