Method
Heat your saucepan over a medium heat and add the butter.
Once the butter has melted, add the onions. Cook the onions until soft.
Add the mince, breaking it up with a wooden spoon.
Brown the mince.
Add the sliced carrots, stock, and Worcestershire sauce to the mince mixture.
Mix the cornflour with some water to make a smooth slurry, then mix into the mince mixture. Add the cornflour mix slowly and stir to avoid lumps.
Turn the heat down to a simmer and let it bubble away until the carrots are cooked.
While the mince is cooking make the tatties.
Add the potatoes to a pan and cover in salted cold water, bring to the boil and simmer for about 15 mins until tender.
Drain well, then allow to steam-dry for a few mins.
Mash an mix in the butter, then season with salt and pepper.