Prep the veg
Peel the Floury Potatoes and cut them into even chunks so they cook at the same pace. Finely chop the Onion, dice the Carrots and Celery, and mince the Garlic.
Boil the potatoes
Put the potato chunks into a large pot, cover with cold water, and bring to a boil. Lower the heat and simmer for 15 minutes, or until the potatoes are tender enough to smash easily with a fork.
Brown the lamb
While the potatoes cook, heat the Olive Oil in a large deep pan over medium-high heat. Add the onion, carrots, and celery and cook for 5 minutes, stirring often, until they start to soften, then add the Lamb Mince and break it up with a spoon. Cook for another 5 minutes, until the lamb is no longer pink and the edges have browned a little.
Build the filling
Stir in the Garlic, Tomato Paste, and Plain Flour, and cook for 1 minute so the flour taste cooks out. Pour in the Stock and Worcestershire Sauce, then add the Thyme Leaves and Rosemary — if they’re fresh, strip and chop them first — plus the Bay Leaf. Season with Salt and Pepper (Black), then simmer gently for 15 minutes, stirring now and then, until the sauce is thick and glossy. Stir in the Frozen Peas and cook for 2 minutes more, just until they’re hot.
Heat the oven
Heat the oven to 200° C and keep a baking dish nearby.
Drain the potatoes
Tip the potatoes into a colander and let them steam dry for a minute or two so the topping stays fluffy, not watery.
Mash the topping
Return the drained potatoes to the hot pot. Add the Unsalted Butter and warmed Milk, then mash until smooth and fluffy; if the mixture feels stiff, add a splash more warm milk. Taste and adjust with a little more salt and pepper if needed, but don’t overwork it or the mash can turn gluey.
Assemble the pie
Spoon the lamb filling into a baking dish and remove the bay leaf. Spread the mashed potatoes over the top, right to the edges, then rough up the surface with a fork so the peaks brown nicely in the oven.
Bake the pie
Bake for 25 minutes, until the top is deeply golden and the filling is bubbling around the edges.
Rest and serve
Let the pie rest for 10 minutes before scooping so the filling settles and each serving holds its shape.























