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Fennel Gratin with Pecorino and Lemon

This elegant fennel gratin with pecorino and lemon is a sophisticated vegetarian side dish that brings a bright, Mediterranean flair to any dinner table. The aniseed notes of the fennel bulbs soften beautifully during the slow sautéing process, becoming sweet and tender before being topped with a citrus-infused crust. Large fennel bulbs are the star here, providing a substantial texture that pairs wonderfully with the salty tang of Italian Pecorino Romano and the crunch of golden panko breadcrumbs.

Perfect for a Sunday roast or as a light main course served with a crisp green salad, this dish is both comforting and fresh. The addition of fresh thyme and lemon zest lifts the savoury flavours, ensuring it never feels too heavy. It is an excellent choice for entertaining, as both the fennel base and the breadcrumb topping can be prepared a day in advance, leaving you with only the final assembly and baking to do when your guests arrive.

Continue reading below

Ingredients for Fennel Gratin with Pecorino and Lemon

  • 3 tablespoons butter

  • 170g panko (Japanese breadcrumbs)

  • 110g Pecorino Romano cheese

  • 1 tablespoon chopped fresh Italian parsley

  • 1 1/2 teaspoons finely grated lemon peel

  • 5 tablespoons olive oil

  • 1 12- to 375g onion, halved, cut into 1/4-inch-thick slices

  • 3 large garlic cloves, minced

  • 5 large fresh fennel bulbs, trimmed, cored, cut into 1/4-inch-thick slices

  • 120ml low-salt chicken broth

  • 2 tablespoons chopped fresh Italian parsley

  • 1 tablespoon chopped fresh thyme

  • 1 1/2 teaspoons coarse kosher salt

  • 1/2 teaspoons black pepper

  • Ingredient Info: Panko can be found in the Asian foods section of most supermarkets.

Lightly oil shallow 2-quart glass or ceramic baking dish. Heat 5 tablespoons oil in large wide pot over medium heat. Add onion and garlic; sauté until soft but not brown, about 5 minutes. Add fennel; increase heat to medium-high and sautéuntil fennel is slightly softened and beginning to brown, stirring frequently, about 18 minutes. Stir in broth and next 4 ingredients. Reduce heat to medium-low; simmer until most of broth is absorbed, about 5 minutes. Transfer to dish.DO AHEAD: Can be made 1 day ahead. Cool slightly; cover and chill. Let stand at room temperature 1 hour before baking.

Melt butter in large nonstick skillet over medium heat. Add panko; sauté until golden, about 3 minutes. Remove from heat; cool to room temperature. Stir Pecorino, parsley, and peel into panko. DO AHEAD: Can be made 1 day ahead. Store airtight in refrigerator.

Preheat oven to 218°C. Sprinkle panko mixture over fennel. Bake until gratin is heated through and topping is deep golden, about 20 minutes. Serve warm.

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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