Gammon Steaks with Parsley Sauce and Mash

A familiar British dinner plate, this dish centres on gammon steaks: thick slices of cured ham, quickly pan-fried until golden at the edges and served hot with creamy accompaniments. Parsley sauce is the classic partner, made as a smooth milk-based white sauce enriched with butter, lifted with fresh herbs, Dijon mustard and a little lemon to cut through the saltiness of the meat. Fluffy mash makes the meal feel generous and complete, soaking up the sauce without overwhelming it. It is straightforward enough for a weeknight, but still has the comfort and structure of a proper cooked supper.
Cuisine style British comfort food
Time commitment Under 1 hour

Why this recipe works

  • Balanced richness: Lemon juice and Dijon mustard sharpen the creamy parsley sauce and stop the dish feeling too heavy.
  • Smooth sauce and mash: A simple roux gives the sauce body, while steam-drying the potatoes before mashing helps keep them fluffy rather than watery.
  • Hearty and familiar: Salty gammon, buttery mash and warm parsley sauce make a satisfying plate with classic British dinner flavours.

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Ingredient notes

  • Check the gammon’s saltiness: Gammon varies in salt level. If it tastes especially salty, a short soak in cold water before cooking helps soften the seasoning.
  • Use fresh parsley if possible: Fresh parsley gives the sauce its clean, grassy finish. Dried parsley will not bring the same colour or brightness.

Texture tips

  • For a lump-free sauce: Whisk the milk into the roux gradually so the flour disperses evenly before the sauce thickens.
  • For better mash: Let the drained potatoes steam-dry briefly in the hot pot before adding butter and milk; this improves the texture and prevents watery mash.

Common mistakes

  • Do not brown the roux: Cook the flour and butter just until biscuity-smelling. If it colours too much, the parsley sauce can taste toasted rather than clean and creamy.
  • Avoid harsh heat on the sauce: Keep the sauce at a gentle simmer once the milk is added. Boiling can make it catch on the pan or thicken unevenly.

Make-ahead tips

  • Reheat gently: Warm leftovers slowly until piping hot, adding a splash of milk to loosen the mash or sauce if needed. Avoid boiling the parsley sauce.
  • Best served freshly made: The gammon and mash have the best texture straight after cooking, while the sauce is smoothest before refrigeration.

Equipment you'll need

Ingredients
Instructions
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  1. Peel the potatoes and cut into even chunks. Put them in a large pot, cover with cold water and add 1 tsp of the fine sea salt. Bring to the boil, then cook for 15 to 18 minutes until very tender.
  2. While the potatoes cook, finely chop the parsley and cut the lemon in half. Pat the gammon dry and season with the black pepper. Set a saucepan on the hob ready for the sauce.
  3. Heat a large frying pan over medium-high heat and add 20 g of the unsalted butter. Pan-fry the gammon for 2 to 3 minutes per side until golden and heated through. Transfer to a warm plate.
  4. In the saucepan, melt 20 g of the remaining butter over medium heat. Stir in the plain flour and cook for 1 minute, stirring, until it smells biscuity but has not coloured. Gradually whisk in 250 ml of the whole milk until smooth.
  5. Simmer the sauce for 3 to 4 minutes, whisking often, until thick enough to coat the back of a spoon. Stir in the Dijon mustard, the chopped parsley, and a squeeze of lemon juice. Taste and season with the remaining fine sea salt and more lemon juice if needed.
  6. Drain the potatoes well and return them to the hot pot for 1 minute to steam-dry. Mash with the remaining butter and the remaining whole milk until fluffy and smooth. Serve the gammon with the mash and spoon over the parsley sauce.

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Recipe notes

Tips

  • If your gammon is particularly salty, soak it in cold water for 20 minutes, then pat dry before frying.
  • For the smoothest sauce, add the milk gradually and whisk constantly so the roux stays lump-free.
  • If serving anyone who is pregnant, elderly, or immunocompromised, make sure the gammon is cooked until piping hot throughout.

Substitutions

  • Replace Whole milk with Low-fat milk for a lighter sauce and mash, adding a little extra Unsalted butter for richness if you like.
  • Replace Fresh parsley with Fresh chives for a milder, oniony finish.
  • Replace Dijon mustard with Whole-grain mustard for a coarser texture and gentler heat.

Storage

  • Refrigerate up to 2 days
  • Cool leftovers quickly, then refrigerate in a sealed container. Reheat the mash with a splash of Whole milk in a saucepan over low heat, and warm the gammon and sauce gently until piping hot; avoid boiling the sauce.

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Recipe overview

  • Servings: 2 servings
  • Total time: 40min (35min active)
  • Difficulty: Easy
  • Cuisine: British
  • Allergens:
    Gluten Milk Wheat
Beginner friendly Kid friendly

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