Step 1

Heat oven to 180C/160C fan/gas Dry-fry the mince and onion in a large non-stick frying pan over a high heat. Stir frequently to break up the mince, until well browned. Add the mushrooms and plain flour, followed by the stock and Worcestershire sauce. Bring to a simmer, then gently cook for 10 mins.

Step 2

Meanwhile, to make the cobbles, mix the self-raising flour and thyme together in a bowl. Stir in the yogurt with enough cold water to form a scone-like dough. On a lightly floured surface, roll out to the thickness of about 1.5cm and use a cutter to stamp out 12 x 5cm rounds.

Step 3

Stir the peas into the mince mixture, then transfer to a baking dish. Randomly place the cobbles on top of the mince, then bake for 20-25 mins, until cobbles are risen and golden brown. This is good served with horseradish sauce.