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Baked Fish and Potatoes with Rosemary and Garlic

This Mediterranean-inspired baked fish with rosemary and garlic is a wonderful example of heart-healthy cooking that doesn't compromise on flavour. By roasting firm-fleshed fish alongside golden new potato wedges and whole garlic cloves, you create a complete, nutritious meal in a single dish. The fragrance of fresh rosemary and the subtle crunch of golden breadcrumbs provide a sophisticated finish to this simple, wholesome supper.

Ideal for a light weekend lunch or a nutritious midweek dinner, this recipe works beautifully with sustainably sourced varieties such as sea bass or red snapper. The combination of heart-healthy fats from extra virgin olive oil and the lean protein of the fish makes it a superb choice for those mindful of their cardiovascular health. Serve it straight from the oven with a side of steamed seasonal greens or a crisp garden salad.

Continue reading below

Ingredients for Baked Fish and Potatoes with Rosemary and Garlic

  • 450g new potatoes, peeled, washed, and cut into wedges

  • An oven-to-table baking dish that can accommodate both the fish and the potatoes in one layer

  • 60ml extra virgin olive oil

  • 4 or 5 fresh rosemary sprigs

  • 4 whole garlic cloves, peeled

  • Fine sea salt

  • Black pepper ground fresh from the mill

  • A 900g fillet from a firm-fleshed fish, such as grouper, striped bass, red snapper, or mahi mahi

  • 2 tablespoons fine, dry, unflavored bread crumbs

How to make Baked Fish and Potatoes with Rosemary and Garlic

  1. Turn on the oven to 204°C.

  2. Place the potato wedges in the baking dish, pour 2 tablespoons of the olive oil over them, add 2 sprigs of rosemary, all the garlic cloves, and salt, and pepper. Toss thoroughly. Put the dish in the preheated oven.

  3. After 15 minutes, remove the dish to turn the potatoes over, then put it back in the oven. Cook until the potatoes feel tender when tested with a fork, another 10 minutes or so.

  4. Remove the dish from the oven. Push the potatoes to the sides, making room in the centre for the fish fillet to lie flat.

  5. Wash the fish fillet, pat it dry with paper towels, and lay it flat in the dish, skin side down. Strip the leaves from the remaining rosemary sprigs, scatter them over the fish, add salt and pepper, and sprinkle the bread crumbs and the remaining 2 tablespoons olive oil over the fillet. Return the dish to the oven and bake for 14 minutes. Let the dish settle out of the oven for 3 to 4 minutes before bringing it to the table.

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.

  • 17 Jan 2026 | Originally published

    Authored by:

    UK recipe editors

    Peer reviewed by

    UK recipe editors
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