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Baked Sardines in Pepperonata

This Mediterranean-inspired dish of baked sardines in pepperonata is a celebration of punchy, coastal flavours. The base is a rich, slowly simmered pepperonata made with roasted red peppers, tangy white wine vinegar, and salty capers. This sweet and sour foundation provides the perfect contrast to the oily richness of fresh sardines, creating a balanced and vibrant high-protein meal. It is a wonderful way to enjoy sustainable seafood while benefiting from heart-healthy omega-3 fatty acids.

Perfect for a light lunch or a nutritious midweek supper, this recipe is best served with plenty of grilled crusty bread to soak up the delicious juices. The combination of colourful vegetables and perfectly roasted fish makes it a nutritious choice for those looking for a wholesome, low-carbohydrate main course. Simply finish with a scatter of fresh dill and a drizzle of extra virgin olive oil for an authentic taste of the Mediterranean summer.

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Ingredients for Baked Sardines in Pepperonata

  • 4 red peppers

  • 120ml olive oil, plus more for drizzling

  • 1/2 medium red onion, thinly sliced

  • 2 garlic cloves, thinly sliced

  • Kosher salt, freshly ground pepper

  • 2 tablespoons tomato paste

  • 1 tablespoon sugar

  • 120ml dry white wine

  • 120ml white wine vinegar

  • 2 tablespoons chopped fresh flat-leaf parsley

  • 2 tablespoons drained capers

  • 1/2 teaspoons dried oregano

  • 8 whole fresh sardines, scaled, gutted, deboned

  • Chopped fresh dill and grilled crusty bread (for serving)

Preheat grill. Grill peppers on a broilerproof rimmed baking sheet, turning occasionally, until blistered all over, 8–10 minutes. Transfer to a medium bowl, cover with plastic wrap, and let sit 15 minutes. Peel, seed, and slice into 1/2"-wide strips.

Reduce oven temperature to 232°C. Heat 60ml oil in a large skillet over medium heat. Add onion and garlic; season with salt and pepper and cook, stirring occasionally, until softened, 8–10 minutes. Increase heat to medium-high, add tomato paste and sugar and cook, stirring, until tomato paste is beginning to darken, about 1 minute. Add wine and vinegar and cook, stirring often, until slightly reduced, about 2 minutes. Mix in roasted peppers, parsley, capers, and oregano. Cook, stirring occasionally, until slightly thickened, about 5 minutes. Transfer pepperonata to a shallow 3-quart baking dish.

Season sardines inside and out with salt and pepper; lay on top of pepperonata. Drizzle with oil and bake until sardines are firm and beginning to brown, 15–20 minutes. Top with dill, drizzle with more oil, and serve with bread.

Disclaimer

While every effort has been made to ensure the information is accurate and up to date, individual needs may vary and dietary requirements can differ based on personal health conditions. Always check food labels and allergen information before preparing or consuming any recipe. If you have specific health concerns, allergies, intolerances, or are following a medically prescribed diet, seek advice from your GP, pharmacist, or a registered dietitian before making significant changes to your diet or lifestyle.

Article history

The information on this page is peer reviewed by qualified clinicians.

  • 28 Jan 2026 | Originally published

    Authored by:

    UK recipe editors

    Peer reviewed by

    UK recipe editors
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