
Transform leftover roasted ham into a comforting, golden-crusted masterpiece. This creamy pie features tender leeks, a hint of sherry, and a unique mustard-infused pastry that adds a sophisticated tang to every bite.
Heat a deep, heavy frying pan or flameproof casserole dish over medium heat. Add the butter and olive oil. Once the butter has melted, stir in the sliced leeks and thyme sprigs. Add a pinch of salt and sauté for 15-20 minutes, stirring occasionally, until the leeks are completely softened.
Stir in the crushed garlic and cook for one minute until fragrant. Add the cubed ham and sprinkle over the flour. Stir well for a minute to ensure the ham and leeks are evenly coated in flour, then pour in a splash of the sherry to deglaze the pan.
Gradually pour in the remaining sherry and the stock, stirring constantly to prevent lumps. Bring the mixture to a simmer and let it bubble for 5-10 minutes until the sauce has thickened. Remove from heat, discard the thyme sprigs, and stir in the chopped soft herbs, double cream, and English mustard. Season to taste, then transfer the filling into a lipped pie dish and allow it to cool completely.
In a small bowl, whisk the egg and wholegrain mustard together. Brush the rim of the pie dish with a little of this mixture. Drape the puff pastry sheet over the dish, trim the excess, and press the edges with a fork or your fingers to seal. Use any pastry offcuts to create decorative shapes on top if desired.
Brush the entire pastry top with the remaining mustard-egg glaze and sprinkle with sea salt flakes. Chill the pie in the fridge until you are ready to bake. For the best finish, apply a second coat of glaze just before putting it in the oven.
Preheat your oven to 220°C (200°C fan/gas mark 7). Bake the pie for 25-30 minutes until the pastry is risen and deeply golden. Serve hot with buttered new potatoes and seasonal peas.
For the best flavor, use a high-quality leftover ham hock or honey-roasted ham. If you don't have sherry, a dry white wine like Sauvignon Blanc is an excellent substitute. This pie can be assembled up to 24 hours in advance and kept chilled, or frozen for up to three months.




