Sea Bass, Tarragon Creamed Leeks & Sweet Potato Mash

Serving size

Prep in 10 4 of 5 a day Low sat fat

Sea Bass, Tarragon Creamed Leeks & Sweet Potato Mash

Prep time: 0 mins
Total time: 25 mins
Cuisine: European
Food group: Fish

Only the best for Mum with this restaurant-worthy plate. Sustainably caught lemon sole, delicate and tender. Creamed British leeks with yoghurt and zingy capers. Garlicky crispy kale and a vitamin-packed sweet potato mash. A meal that guarantees you'll be the favourite.

Cooking Instructions

The protein cooking time listed in this recipe has been updated.

As of December 2025, we've revised cooking times for all our proteins to reflect improved food safety guidance.

Check out the latest recommended times in our Cooking Guidelines.

  1. Turn the grill to high (240C). Bring a saucepan filled with salted hot water to a boil. Roughly chop the sweet potato into 2cm chunks (peel optional), then add to the pan. Simmer for 15-18 mins, until soft, then drain.
  2. Trim and slice the leek into 1/2cm thick half-moons. Halve the lemon. Heat a large frying pan with 1/2 tbsp oil on medium-high heat. Add the leek and half the garlic and cook for 3-4 mins. Add the yoghurt, capers and 150ml hot water (75ml for 1 person). Crumble in half the stock cube and stir. Pick the tarragon from the stalks and roughly chop. Cook for 3-5 mins, until thickened. Season with a small squeeze of lemon juice (to taste) and stir through the chopped tarragon.
  3. Drizzle the fish with 1/2 tbsp oil and place skin-side up on a large foil-lined baking tray. Season with sea salt. Grill for 3-5 mins, or until cooked through. Season with a squeeze of lemon juice (to taste).
  4. Heat a large frying pan on medium heat. Add the almonds and toast for 2-3 mins, until golden brown. Remove and set aside. Add 1/2 tbsp oil, the kale and the remaining garlic. Cook for 1-2 mins, until golden. Add a splash of water and steam for 1-2 mins, until soft. Season with sea salt.
  5. Return the sweet potato to the pan and mash with 1 tbsp oil, a pinch of sea salt and black pepper.
  6. Serve the mash on plates alongside the leek, kale and lemon sole. Sprinkle with almonds and garnish with the remaining lemon, as wedges.

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